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Old 05-08-2011, 17:59   #51
whenmonkeysfly
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FPS variance question?

Quote:
Originally Posted by MCNETT View Post
Here is some info from my work with Longshot. Always start 1.0gr lower and work up in .2gr increments until you see pressure signs. (Waters' method):
Starline Brass, CCI 350 primers, 1.26" OAL. 10 shot avg. G20 85F and 5000ft elevation.

135gr Nosler 13.2gr LS - 1542fps
165 GSHP 10.4gr LS - 1356fps
180 GSHP 9.6gr LS - 1294fps
200 XTP 8.2gr LS - 1172fps

These are loads that I have worked up to and are under 37,500psi when I had them tested. I hope this helps!
-Mike
My data for a 180 grain TMJ is ~100fps more and brass looked stressed:

Hodgdon Longshot
Speer 180 Grain TC FMJ
New Starline Brass
CCI-350 Primers
1.255 OAL
6" LWD Barrel
Wolff 22# Spring
60F, Sea Level

String 1 - (9.6 Grains of Hodgdon Longshot)
1) 1403.0 4.4
2) 1392.0 -6.6
3) 1388.0 -10.6
4) 1408.0 9.4
5) 1402.0 3.4

High: 1408.0
Low: 1388.0
E.S.: 20.0
Ave.: 1398.6
S.D.: 8.3
95%: ±11.5

Do you think it's the six inch barrel and sea level?

I'm looking to develop a 180 grain CMJ/JHP at ~1300fps. I seem to be getting close to those velocities with 8.4 grains of Longshot (.1 grain less than minimum?). Go figure? Just puzzled... any ideas or suggestions?
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Old 05-08-2011, 19:40   #52
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Quote:
Originally Posted by glascowangus View Post
Picked up some longshot and would like to do a little reloading while awaiting new barrel, spring, etc.. Out of a stock Glock 20 what would be the starting loads for 155 XTP and 180XTP using longshot. Experienced reloader and will take any and all advise at my own risk. Many thanx
Out of a KKM 4.6 inch barrel with 11.5 gr LS New starline brass CCI 350 1.257 COAL I got 1477ft/sec primers Ok but would drop to 9.3 gr for a stock barrel and work up slowly. Published data from Hogdon shows max load @ 9.3 gr 31500 psi so there is some room to go beyond.
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Old 05-08-2011, 20:05   #53
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Quote:
Originally Posted by whenmonkeysfly View Post
My data for a 180 grain TMJ is ~100fps more and brass looked stressed:

Hodgdon Longshot
Speer 180 Grain TC FMJ
New Starline Brass
CCI-350 Primers
1.255 OAL
6" LWD Barrel
Wolff 22# Spring
60F, Sea Level

String 1 - (9.6 Grains of Hodgdon Longshot)
1) 1403.0 4.4
2) 1392.0 -6.6
3) 1388.0 -10.6
4) 1408.0 9.4
5) 1402.0 3.4

High: 1408.0
Low: 1388.0
E.S.: 20.0
Ave.: 1398.6
S.D.: 8.3
95%: ±11.5

Do you think it's the six inch barrel and sea level?

I'm looking to develop a 180 grain CMJ/JHP at ~1300fps. I seem to be getting close to those velocities with 8.4 grains of Longshot (.1 grain less than minimum?). Go figure? Just puzzled... any ideas or suggestions?
Here's Hodgdon Data:

Cartridge: 10mm Auto
180 GR. SIE JHC Hodgdon Longshot: Starting Loads - 8.5 Grains, fps 1221
Maximum Loads - 9.5 Grains, fps 1287
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Old 05-08-2011, 20:11   #54
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Quote:
Originally Posted by texas 48 View Post
Out of a KKM 4.6 inch barrel with 11.5 gr LS New starline brass CCI 350 1.257 COAL I got 1477ft/sec primers Ok but would drop to 9.3 gr for a stock barrel and work up slowly. Published data from Hogdon shows max load @ 9.3 gr 31500 psi so there is some room to go beyond.
That's smokin' Tex! And, that's a stout load of Longshot! Did you get 1477fps with a 155 or 180 grain XTP or both?
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Old 05-09-2011, 21:31   #55
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Quote:
Originally Posted by whenmonkeysfly View Post
That's smokin' Tex! And, that's a stout load of Longshot! Did you get 1477fps with a 155 or 180 grain XTP or both?
It is smoken. That was with the 155gr XTP. I only load lighter bullets because I don't hunt and very hot 180 and 200gr bullets are more for 4 legged threats and the chance of a thru and thru on 2 legged treats is greater. My last post I stated that Hogdon max load for 155Xtp was 9.3 that was for a .40 not 10mm but velocity for ths .40 load was 1283 ft/sec. at 11.5 gr in the 10mm 200 ft/sec is not big stretch. Someone else posted that they used 12.5 gr but From the numbers I got with 11.5 I would not go any higher. That load may be too hot for 2 legged threats with the XTP.11.0gr gave me 1420ft/sec and was more accurate and probably safer. Have not fired in a stock barrel so I can't safely recommend going that high in the stock barrel. Next time out I will see the condition of the brass out of my stock barrels.
I use a 165gr Golden Saber in new Starline nickel plate brass with a 10.0 of power pistol (max published load) CCI350
1.255 -1.258 1396 ft/sec 4.6 inch barrel SD 11.4 for my carry loads.
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Old 07-11-2011, 17:40   #56
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Made my first workups with Longshot powder. Stuck with Hodgdon book data. My initial impressions are favorable. While I hand weighed each charge, it is a pwder that meters quite well. I have heard the nickname, "loudshot" in the past, but it did not seem noticeably loud. It was certainly not loud like Blue Dot. It burned relatively clean. Somewhere between 800-X and Accurate 9/7 powders in terms of powder residue and cleanliness.

There is nothing too exciting here, but I thought I would add some data points to the sticky.

Firearm: Gen 3 Glock 20 with 22# Wolff spring and steel non-captured guide rod. Stock barrel.

Temp: 90F

Brass: Starline
Primer: CCI 300
Powder: Hodgdon Longshot
COL: 1.26"
Crimp: .421" as measured at the case mouth
Bullet: Hornady 200 gr XTP
Velocities are averages not corrected to the muzzle

7.0 grains
Vel: 1038
ME: 478

7.3 grains
Vel: 1068
ME: 506

7.6 grains
Vel: 1091
ME: 528

7.8 grains
Vel : 1105
ME: 542

8.0 grains
Vel: 1110
ME: 547

8.2 grains (Hodgdon book max)
Vel: 1146
ME: 583
Note that this load penetrated cleanly through five water-filled milk jugs.

None of the loads exhibited symptoms of excess pressure. Maximum case expansion was gtg. Groups were all respectable.

I have several strings of 180 gr XTPs loaded. I will post the results when available.

Last edited by Taterhead; 07-11-2011 at 17:42.. Reason: point of clarification
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Old 07-11-2011, 19:22   #57
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Taterhead, thanks for posting the data...
LongShot, does a good job and is one of the powders to use with the 10mm. I had used almost all of my 1 lb jug of LS for my 9x25Dillon project, but have just a little to test a few loads with.
For me right now, I am trying to use my new 5 lb jug of Blue Dot. It may go pretty fast with a ton of 10mm, 40S&W and 357Sig to load.
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Old 07-30-2011, 10:55   #58
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This data is posted in response to whenmonkeysfly's issue with his 9.6gr 180 load. Since I had almost the exact same setup, except standard (CCI#300) instead of mag primers, and my brass did not suffer at all. I measure case head expansion just above the extractor groove on the webbing of the brass. For my new Starline, my average is 0.4220".

4/11/2011, 180gr XTP, 9.7gr Longshot, CCI #300, New Starline brass, 1.255" OAL, 62F, 22lb Wolff spring.

Using the LWD 6" BBL

1407
1400
1394
1404
1387
ft-lbs
Lo 1387 769
HI 1407 791
Avg 1398.4 782
Es 20
Sd 8.02

Notes: Case heads .4226 - .4232". Light to moderate ejector/extractor marks.

Stock G20 barrel, same load, same day/conditions, using the 22lb Wolff spring:

1275
1306
1306
1291
1298
ft-lbs
Lo 1275 650
HI 1306 682
Avg 1295.2 671
Es 31
Sd 12.91

Notes: Case heads .4232 - .4240". Light to moderate ejector/extractor marks.

My objective was to get 1300fps out of the stock G20 barrel without any signs of brass stress, and this load made that criteria easily. It also makes an excellent 1400fps hunting load from the 6" barrel.

I know there are varying opinions on standard vs. magnum primers and when to use each, but comparing my data to whenmonkeysfly's load with a similar set up, main difference is primers, it would appear that .1gr more powder and a standard primer achieved the same result with much less strain on the brass.

Hope this helps!
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Old 08-08-2011, 18:27   #59
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Longshot Data - 10mm 1911 5" Barrel

8.6 Grains Hodgdon Longshot
Montana Gold 155 Grain JHP
Starline Brass
CCI-300 Large Pistol Primers
1.2450 OAL; Taper Crimp .421
5" Match Barrel
99F, (VERY HOT & HUMID) Sea Level

Just wanted to post this data since I do not see a lot of info with the 10mm, Longshot Powder and the 155 Grain Bullet. This load could go hotter or milder, but I wanted a relatively soft shooting, accurate, full-power load with reloadable brass for my Dan Wesson Razorback Limited Edition. (This load seemed to fit the bill.) Power Factor of 193 +/-, so it's in the "majors" easily. You can get similar results from a .40 S&W, but I think you'll beat your gun to death in relatively short order IMHO.


Here's my data:

Total Strings = 3
Feet Per Second

String 1
1) 1245.0 8.6
2) 1233.0 -3.4
3) 1221.0 -15.4
4) 1214.0 -22.4
5) 1210.0 -26.4
6) 1255.0 18.6
7) 1250.0 13.6
8) 1271.0 34.6
9) 1229.0 -7.4

High: 1271.0
Low: 1210.0
E.S.: 61.0
Ave.: 1236.4
S.D.: 20.3
95%: ±16.6

String 2
1) 1256.0 5.0
2) 1237.0 -14.0
3) 1264.0 13.0
4) 1271.0 20.0
5) 1249.0 -2.0
6) 1243.0 -8.0
7) 1267.0 16.0
8) 1221.0 -30.0

High: 1271.0
Low: 1221.0
E.S.: 50.0
Ave.: 1251.0
S.D.: 17.0
95%: ±15.2

String 3
1) 1249.0 -2.8
2) 1246.0 -5.8
3) 1248.0 -3.8
4) 1260.0 8.2
5) 1227.0 -24.8
6) 1269.0 17.2
7) 1257.0 5.2
8) 1246.0 -5.8
9) 1264.0 12.2

High: 1269.0
Low: 1227.0
E.S.: 42.0
Ave.: 1251.8
S.D.: 12.5
95%: ±10.2

(End Of Data)

In the next few days I want to try a 165 grain bullet with the same loading specs. I'll post the results in the coming days.

-WMF (Jay)
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Last edited by whenmonkeysfly; 08-09-2011 at 09:31.. Reason: 8.6 Grains of Longshot Used and added Taper Crimp Data
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Old 08-08-2011, 18:51   #60
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Quote:
Originally Posted by whenmonkeysfly View Post
Hodgdon Longshot
Montana Gold 155 Grain JHP
Starline Brass
CCI-300 Large Pistol Primers
1.2450 OAL
5" Match Barrel
99F, (VERY HOT & HUMID) Sea Level

Just wanted to post this data since I do not see a lot of info with the 10mm, Longshot Powder and the 155 Grain Bullet. This load could go hotter or milder, but I wanted a relatively soft shooting, accurate, full-power load with reloadable brass for my Dan Wesson Razorback Limited Edition. (This load seemed to fit the bill.) Power Factor of 193 +/-, so it's in the "majors" easily. You can get similar results from a .40 S&W, but I think you'll beat your gun to death in relatively short order IMHO.


Here's my data:

Total Strings = 3
Feet Per Second

String 1
1) 1245.0 8.6
2) 1233.0 -3.4
3) 1221.0 -15.4
4) 1214.0 -22.4
5) 1210.0 -26.4
6) 1255.0 18.6
7) 1250.0 13.6
8) 1271.0 34.6
9) 1229.0 -7.4

High: 1271.0
Low: 1210.0
E.S.: 61.0
Ave.: 1236.4
S.D.: 20.3
95%: ±16.6

String 2
1) 1256.0 5.0
2) 1237.0 -14.0
3) 1264.0 13.0
4) 1271.0 20.0
5) 1249.0 -2.0
6) 1243.0 -8.0
7) 1267.0 16.0
8) 1221.0 -30.0

High: 1271.0
Low: 1221.0
E.S.: 50.0
Ave.: 1251.0
S.D.: 17.0
95%: ±15.2

String 3
1) 1249.0 -2.8
2) 1246.0 -5.8
3) 1248.0 -3.8
4) 1260.0 8.2
5) 1227.0 -24.8
6) 1269.0 17.2
7) 1257.0 5.2
8) 1246.0 -5.8
9) 1264.0 12.2

High: 1269.0
Low: 1227.0
E.S.: 42.0
Ave.: 1251.8
S.D.: 12.5
95%: ±10.2

(End Of Data)

In the next few days I want to try a 165 grain bullet with the same loading specs. I'll post the results in the coming days.

-WMF (Jay)
thanks for the data but did I miss the grains used
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Old 08-09-2011, 09:29   #61
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Quote:
Originally Posted by texas 48 View Post
thanks for the data but did I miss the grains used
Crap, that's what happens when you get old! I corrected the post to reflect 8.6 Grains of Longshot. Thanks for pointing that out Tex!
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Old 08-24-2011, 10:59   #62
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I have trouble measuring LongShot to get consistent loads. It can be consistent for a few rounds, then jumps 0.5gr with one. The powder sticks to walls of Lee Pro AutoDisk. Static electricity?

Any remedial suggestion?
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Old 08-25-2011, 11:47   #63
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I wanted to post this data as well since I found it extremely easy to shoot and very accurate. Meets the Major Power Factor at 173+.

Hodgdon Longshot - 7.5 Grains
Rainer .40/10mm 165 Grain TC Bullet
Starline Brass
CCI-300 Large Pistol Primers
1.2450 OAL
5" Match Barrel (Wilson Combat Tactical Elite 1911 10mm)
99F, (VERY HOT & HUMID) Sea Level

Total Strings = 4
(Feet Per Second)

String 1
1) 1088.0 1.6
2) 1064.0 -22.4
3) 1107.0 20.6
4) 1116.0 29.6
5) 1090.0 3.6
6) 1086.0 -0.4
7) 1078.0 -8.4
8) 1062.0 -24.4

High: 1116.0
Low: 1062.0
E.S.: 54.0
Ave.: 1086.4
S.D.: 18.8
95%: ±16.8

String 2
1) 1067.0 -13.8
2) 1055.0 -25.8
3) 1083.0 2.2
4) 1084.0 3.2
5) 1085.0 4.2
6) 1080.0 -0.8
7) 1089.0 8.2
8) 1103.0 22.2

High: 1103.0
Low: 1055.0
E.S.: 48.0
Ave.: 1080.8
S.D.: 14.4
95%: ±12.9

String 3
1) 1086.0 -3.5
2) 1098.0 8.5
3) 1101.0 11.5
4) 1102.0 12.5
5) 1093.0 3.5
6) 1073.0 -16.5
7) 1075.0 -14.5
8) 1088.0 -1.5

High: 1102.0
Low: 1073.0
E.S.: 29.0
Ave.: 1089.5
S.D.: 11.1
95%: ±9.9

String 4
1) 1047.0 -28.0
2) 1077.0 2.0
3) 1070.0 -5.0
4) 1067.0 -8.0
5) 1085.0 10.0
6) 1068.0 -7.0
7) 1101.0 26.0
8) 1085.0 10.0

High: 1101.0
Low: 1047.0
E.S.: 54.0
Ave.: 1075.0
S.D.: 16.0
95%: ±14.3

(End Of Data)
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Old 08-25-2011, 12:06   #64
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Quote:
Originally Posted by ModGlock17 View Post
I have trouble measuring LongShot to get consistent loads. It can be consistent for a few rounds, then jumps 0.5gr with one. The powder sticks to walls of Lee Pro AutoDisk. Static electricity?

Any remedial suggestion?
ModGlock17,

I don't know anything about the Lee Pro AutoDisk (I use a Dillon 650XL), but I had a similar problem using used brass and Hornady One Shot Case Lube. New brass, no problem, which I found somewhat puzzling. I clean my brass with a liquid media, so static electricity from tumbling shouldn't necessarily be an issue, but maybe that's what's going on with yours? What kind of case lube are you using? Is the powder sticking to your dies too? I cleaned my powder die and it seemed to remedy my problem. I would be curious to what others think on this thread.
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Old 08-25-2011, 12:36   #65
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Is it just me or does anyone else find Longshot a little dirty?
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Old 08-25-2011, 16:17   #66
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Quote:
Originally Posted by whenmonkeysfly View Post
ModGlock17,

I don't know anything about the Lee Pro AutoDisk (I use a Dillon 650XL), but I had a similar problem using used brass and Hornady One Shot Case Lube. New brass, no problem, which I found somewhat puzzling. I clean my brass with a liquid media, so static electricity from tumbling shouldn't necessarily be an issue, but maybe that's what's going on with yours? What kind of case lube are you using? Is the powder sticking to your dies too? I cleaned my powder die and it seemed to remedy my problem. I would be curious to what others think on this thread.
Thanks for the reply. I use carbide die with Lee Classic Turret. I'm near "Lalaland, FL" (Disney) and as you know, humidity is high. I don't think our AC is taking out enough water from the air to make things prone to static. The Pro AutoDisk slides a disk with known volume under the powder container then slides it over to the charging die to drop the load.

BDot is superbly accurate. 800x can be any where from 0 to +0.5gr over my target weight (so I had to manually correct each case). And this is my first time with LongShot. Hogdon said 8.5 to 9.5gr for 180gr bullet. When I set it to 9.0gr, I will get that for a few cases, then all of a sudden, I get a 9.5gr!

I have to be convinced of its (or the whole dispensing system's) accuracy before I abandon my check on every case.

Since I don't have experience with LShot, I am not sure what is "normal" for it. So I am not sure I have a bad 1-lbs containter or not. Now, when I was done, I dumped the remainder of plastic dispenser back to container. That is when I notice it (quite a few flakes) tends to stick to the walls of the plastic dispenser, UNLIKE BDot and 800x. Had to tab it hard to make them drop. That's when the static electricity idea came to mind.

May be I should try wiping the outside of the dispenser with a slightly moist rag to neutralize potential static.

I was wondering you guys have the same stick-to-the-wall experience, since I think that is what gave rise to inconsistent loads.
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Old 08-25-2011, 16:31   #67
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Quote:
Originally Posted by ModGlock17 View Post

May be I should try wiping the outside of the dispenser with a slightly moist rag to neutralize potential static.

I was wondering you guys have the same stick-to-the-wall experience, since I think that is what gave rise to inconsistent loads.
I've heard of coating the inside of the powder measure / dispenser with powdered graphite. Its inert in small amounts (as related to gunpowder in cases) and can be bought in tiny tubes or simply rubbed off from a pencil.

I've used it on my Lee Primer Arm to assist with pivoting as its suggested liquid oil not be used.
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Old 08-25-2011, 19:05   #68
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3 things

I'll qualify all this with the fact that I'm new to reloading and the 10mm.

1) I have been reloading with Longshot and have seen a bit of static cling on the sides of my RCBS powder dispenser. I get some variation in weight but not .5 grains. I use a powder baffle in mine.

2) I seem to be getting higher velocities than others, to be brief I'm getting about 1330 fps from this:

New G20 sf (15 round mag), temp mid 70's, low humidity, 6,500 ft elevation:

180 grain XTP
9.5 grains Longshot
CCI 350 primers
1.260 COL
New Starline brass

Here are some dimensions on brass measured just up from the base:

New unfired - 0.421"
Once fired stock barrel 0.433"
Once fired Lone Wolf barrel 0.426"

3) I'm having problems with reliable feeding of this load (jamming), I have also used Montana Gold CMJ, 180 gr. I have a post in the 10 ring but hoped that I would get some additional feedback from this group. Thanks to those of you that have replied from the 10ring. Hopefully the cross post won't make the Mods mad. I'm really quite surprised no one has commented on the tendency to feed left as being a possible problem. Any additional insight would be greatly appreciated. If this gun won't fire this type of load reliably it is of no use to me.

http://www.glocktalk.com/forums/show...48&postcount=1
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Old 08-25-2011, 19:28   #69
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You may want to use a Lee Factory crimp die or go to a shorter OAL and reduce the charge by .1 or .2. I believe a brighter crimp would be the answer to you jamming providing your mag and mag springs are good. What weight recoil spring are you using.
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Old 08-25-2011, 19:50   #70
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Originally Posted by texas 48 View Post
You may want to use a Lee Factory crimp die or go to a shorter OAL and reduce the charge by .1 or .2. I believe a brighter crimp would be the answer to you jamming providing your mag and mag springs are good. What weight recoil spring are you using.
I should have provided a bit more information here. Regarding the jamming it is nose up to the left. This has happened repeatedly in stock form as well as with a 22# spring and SS guide rod. I have reduced the OAL to 1.255" with no change (I didn't reduce the load, but should have). I'm currently using RCBS carbide dies.

I had thought about a tighter crimp though it seems good now, as far as holding the bullet securely (takes a lot of pounding, with a dynamic bullet puller, to get it to move). Maybe I should give that a try but I don't want to go with too much crimp either.

Last edited by mtn_hunter; 08-25-2011 at 21:15..
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Old 08-26-2011, 11:11   #71
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ModGlock17,

As we know, 0.5 grain variances is not acceptable and especially when you are working toward maximum loads. (0.1 grain variance is okay for a drop powder measure.) No variance for a trickle powder measure and I weigh a second time here on either my digital scale or beam scale.

Of course, "maximum" loads are all over the place depending on where the information is obtained. I have used several reloading books, along with several online handloading sites (paid and free), along with published data from others on this website in my "max" loads.

When I'm working anywhere near "my" max loads, I weigh all my charges a second time. I also make sure my digital scale is calibrated and zeroed. I then recheck the zero periodically, because I've found it "drifting" over time.

When I'm working in "new" territory with a 10mm powder, I will use my Smith & Wesson 610 Revolver with a 6 1/2" barrel for testing since it (they) are built on an "N-frame". Chronograph the loads and look for signs of over pressure. Then I adjust the loads for one of my semi-autos.

I like NickE10mm suggestion using graphite. I have also thought about using a "static-free" dryer sheet and lightly wiping down components. (It will make your handloads smell pretty too.)

I'm in Florida, so heat and humidity are extremely high. I use a dehumidifier in an air-conditioned area.

I have noticed some Longshot powder sticking to the lip and sides of the powder container. I also noticed that plastic scale powder/funnel pans allow powder to stick to them as well, so I use metal scale powder/funnel pans (RCBS makes a good one.)

IMHO, I think wiping down components with graphite and/or an anti-static cloth should help significantly.
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Old 08-27-2011, 05:15   #72
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Originally Posted by whenmonkeysfly View Post
I like NickE10mm suggestion using graphite. I have also thought about using a "static-free" dryer sheet and lightly wiping down components. (It will make your handloads smell pretty too.)

..............
IMHO, I think wiping down components with graphite and/or an anti-static cloth should help significantly.
Thank you Gentlemen. I will try both of your suggestions, as my inventory ran low because I just shot some groups with LongShot weights 9.0gr, 9.2gr, 9.4gr on 180gr bullets.

Long Shot 9.0 on plated Berry180FN
G20 6" 1,256fps std 18.7 630 ft-lbs
G29 stock 1,079fps std 21.3 465 ft-lbs

Speed delta 177fps 165 ft-lbs between two guns


LongShot 9.2 on Nosler180HP
G20 6" 1,271fps std 14.1 646 ft-lbs
G29 stock 1,100fps std 18.5 484 ft-lbs

Speed delta 171fps 162 ft-lbs between two guns




LongShot 9.4 on Nosler180HP
G20 6" 1,255fps std 34.1 629 ft-lbs
G29 stock 1,087fps std 20.4 472 ft-lbs

Speed delta 168fps 157 ft-lbs between two guns



Observations:
1. Optimum Longshot weight for 180gr bullet is 9.2gr with tightest spread.
2. Plated Berry can be very accurate with Longshot 9.0gr
3. LongShot 9.4 appeared to worsen with speed and spread. Waisted powder above 9.2gr weight.

In the same session, I shot my new toy, KelTec Sub2000 using 9mm rounds.
Federal 9mm 115gr (Wal-Mart) 1431fps std 9.1 523 ft-lbs
Georgia Arms 115gr 1357fps std 15.1 470 ft-lbs

What's interesting here is that 115gr 9mm on the Sub2000 (16" barrel) has more energy than 180gr 10mm with LongShots on a less efficient G29.
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Old 08-27-2011, 19:28   #73
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I cotton swabbed (Q-tip) the inside of the charge tube & charge riser, as well as the release hole in the powder container. Very black and dirty.

After that, charge drops are spot on.

What is surprising to me: 800x meters very accurately! But there's a trick: fill the charge container with at least 50% full of 800x. I think the total powder weight inside the container help force to powder down, in much more consisten manner. The inaccuracy starting to increase when the container had less than an eigth full.

Tip/Rule:
1. Clean you drop tube every 500 rounds or so.
2. Keep the powder container more than half full, to get accurate dispensing.
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Old 09-05-2011, 13:07   #74
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Originally Posted by ModGlock17 View Post
I cotton swabbed (Q-tip) the inside of the charge tube & charge riser, as well as the release hole in the powder container. Very black and dirty.

After that, charge drops are spot on.

What is surprising to me: 800x meters very accurately! But there's a trick: fill the charge container with at least 50% full of 800x. I think the total powder weight inside the container help force to powder down, in much more consisten manner. The inaccuracy starting to increase when the container had less than an eigth full.
Tip/Rule:
1. Clean you drop tube every 500 rounds or so.
2. Keep the powder container more than half full, to get accurate dispensing.
That's pretty standard advice regardless of the powder being used. I never let my measure get below 50%.
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Old 10-03-2011, 21:20   #75
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Some Longshot Data

10MM - Longshot - 200 gr Hornady HP/XTP
Stock G20SF - 20# Wolf and Steel Rod
String 1 - 8.2 gr - CCI300
String 2 - 8.4 gr - CCI300
String 3 - 8.2 gr - CCI350 - one rd got away, but shows on target
String 4 - 8.4 gr - CCI350

** String1 String2 String3 String4
** FPS FPS FPS FPS
LO 1080 1108 1106 1106
HI 1132 1143 1140 1154
AV 1102 1125 1115 1131
ES 51.48 34.35 33.26 48.44
SD 15.00 9.21 10.72 14.73
ME 539 562 552 568
CoV 1.36 0.82 0.96 1.30
RD #1 1099 1127 1106 1106
RD #2 1080 1121 1110 1132
RD #3 1091 1128 1124 1124
RD #4 1094 1131 1116 1139
RD #5 1105 1143 1108 1147
RD #6 1103 1108 1110 1112
RD #7 1097 1117 1114 1137
RD #8 1122 1120 1140 1133
RD #9 1098 1125 1109 1125
RD #10 1132 1127 ### 1154

Targets at 25ft, Chrony at 10 ft

Target String 1
http://i541.photobucket.com/albums/g.../Target_01.jpg

Target String 2
http://i541.photobucket.com/albums/g.../Target_02.jpg

Target String 3
http://i541.photobucket.com/albums/g.../Target_03.jpg

Target String 4
http://i541.photobucket.com/albums/g.../Target_04.jpg

I was more worried about not hitting the chrony, where my brass landed, if the weather was going to change and rain on me, than I was about my aim.

Last edited by liver; 10-03-2011 at 21:24..
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