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Old 06-11-2004, 21:27   #26
Cortland
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I tested some 220 gr. LTCs today with my Shooting Chrony. Velocities are at sea level, 80 deg., 100% humidity.

All loads are 220 gr. LTCs, IMR 800X, Starline cases, Winchester WLP, Witness w/ 4.5" barrel, average of 5 shot groups:

6.0 - 885
6.5 - 952
7.0 - 997
7.5 - 1032
8.0 - 1072
8.5 - 1116
9.0 - 1147
9.5 - 1189

Leading was pretty heavy when I was finished.
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Old 07-10-2004, 17:42   #27
BuffaloBo
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Went to the range and Chrono-ed some Winchester 180 FMJ's over some 800x using CCI 350's and Remington nickle cases.
COL was at 1.250"
Gun used was a stock G20 except for a 22lb Wolff Spring.

All results were based on samples of 10 firings:

8.7 gr 800x
Average: 1168 FPS
Standard Dev: 22
Hi: 1212
Lo: 1139


9.0 gr 800X
Average: 1208 FPS
Standard Dev: 32
Hi: 1242
Lo: 1152

9.3 gr 800X
Average: 1253 FPS
Standard Dev: 43
Hi: 1318
Lo: 1190


I had one SERIOUS glock smiley from the 9.3 gr sample. Also, about half of the primers were very flattened from the 9.3 gr sample. From the other samples there weren't any noticeably bulged cases.


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Old 08-03-2004, 18:48   #28
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Some new data today.
Same vartiables as above EXCEPT 5" KKM barrel and only one sample @ 9.3gr IMR-800X


1294
1286
1272
1250
1268
1279
1273
1261
1238
1332

Avg: 1275
Std Dev: 26


Cases look fine thanks to the KKM barrel. I'll try to bump up the powder charge next time.

BuffaloBo
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Old 08-11-2004, 21:40   #29
BuffaloBo
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Some new data today.
Same variables as above EXCEPT 5" KKM barrel and two samples @ 9.5 and 9.7 grains.


(9.5 gr IMR-800X)
Avg: 1289
Std Dev: 34
Hi: 1374
Lo: 1252

(9.7 gr IMR-800X)
Avg: 1326
Std Dev: 22
Hi: 1366
Lo: 1284


Some primers do appear "flattened". Numbers are very good, though.
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Old 08-22-2004, 17:39   #30
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If anybody here, like myself, shoots 357 SIG from a G20 with the appropriate aftermarket barrel, I have some data here to share.


G20 with Federal barrel(standard length)
124 gr Speer Gold Dot
Speer Cases
CCI Primers
10.0C IMR 800-X
COL about 29.5mm


A five shot group produced:

Avg: 1449
Std Dev: 13
Hi: 1467
Lo: 1434

Cases appear not to be bulged at all. Primers appear normal.
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Old 08-22-2004, 19:38   #31
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BuffaloBo
Bullet weight and COL for the 357 Sig?
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Old 08-22-2004, 21:55   #32
BuffaloBo
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Sorry, my bad. 124 gr Speer Gold Dot at a COL of about 29.5mm
Sorry about the metric measure, but it's a lot easier to read and decipher than 32nth's of an inch.

As you may know, the beauty of 357 SIG on the 10 mm platform is the latitude of COL's available. You can load'em long if you need to, because the mags are accomodating . I'm pretty sure I could have made the COL shorter in this loading. I didn't feel any abnormal resistance or see any bullet deformation as a symptom of powder compression.
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Old 09-02-2004, 18:00   #33
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Some new data today.

Glock 20
5" KKM barrel
CCI 350 magnum primers
200 gr Hornady FMJ FP
IMR 800-X


(7 shot sample)
7.8 gr IMR 800-X
Avg: 1105
Std Dev: 23
Hi: 1138
Lo: 1063

(7 shot sample)
8.1 gr IMR 800-X
Avg: 1143
Std Dev: 23
Hi: 1173
Lo: 1112


Some observations:

I'm a little disappointed with these results. I guessed these loads would have done better. Well anyways, the cases and primers appeared normal. I suppose there is some room to load them hotter next time.
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Old 09-14-2004, 09:12   #34
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I chrono'd 200g. XTPs over 10.0g of 800x through my G29 this past weekend and averaged just about 1250 fps. (KKM barrel and 22lb Wolf Spring).

The primer pushed itself into the firing pin hole, leaving a raised square area on the primer.

I was recieving velocities that I had anticipated with other loads, using other guns, and therefore believe this was legit.
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Old 09-14-2004, 10:09   #35
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Quote:
Originally posted by Tito

The primer pushed itself into the firing pin hole, leaving a raised square area on the primer.
Wow, I've never seen that before. I guess that would be the time to step it down a notch.

Last edited by Medpilot 2; 09-14-2004 at 10:12..
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Old 09-14-2004, 10:39   #36
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Yeah, the primer didn't unseat itself, it just left a raised rectangular impression around the firing pin indentation.;P
Apprx. 2mm high and 1mm wide
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Old 09-26-2004, 14:11   #37
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Quote:
Originally posted by Tito

The primer pushed itself into the firing pin hole, leaving a raised square area on the primer.
What you speak of is quite normal with hotter than usual loads. One needs to be concerned when then primer is flush with the base and appears very flat.
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Old 10-12-2005, 15:04   #38
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Quote:
Originally posted by MCNETT
here are a couple of the results from the 10"T/C:
AVG 10 shots Starline cases, CCI 350, 1.26" OAL
135gr Nosler 14.5gr 800X- 2022fps 42,000psi
10.0gr 800X 200XTP - 1552fps 38,500psi

SAAMI max is now 37,500psi.
This outing was a whole lot of fun, with the 10"bbl I can get .44mag ballistics from my 10mm! The 135 EXPLODES milk jugs at that speed!
-Mike
I can't tell you how happy I was to find this forum! I think that it is really cool that the pros are willing to share their data ... and I was really stoked to see actual pressure numbers for the 135gr load ... but then it occurred to me that they were too far over 37.5kpsi for me to want to go there. They do serve as a good boundary for me not to cross, but are there any measured 800X pressures for 135gr Noslers that are a little closer to the SAAMI max?

Thanks so much,

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Old 11-17-2005, 08:19   #39
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Hi guys.

I have been reading that some of you have had some success in tweaking your Uniflow measures to handle 800x reasonable well (used w/ the small cylinder, baffle, and kept mostly full at all times)...

That said, mine is not working so well.

So, while I am inclined to continue to play with it, I thought I'd ask if any here are using an electronic powder scale/dispenser for 800x. It seems to me that powder drop should meter based on weight...not volume...correct? If so, this seems like a naturally better way to meter out 800x.

Thoughts?
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Old 11-17-2005, 08:26   #40
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I'm currently trickling/weighing each charge by hand ;g but I'm thinking that the electronic approach will be my Christmas present ...

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Old 11-19-2005, 21:58   #41
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800x powder measuring

Rigormootis

What sort of variation are you getting with the 800x through the measure?

I have been running it through my Dillion and accuracy is good, but I have not really wanted to check the variation...gotta be ugly with those giant flakes (at least it should be).

Iv'e got to chrono some loads pretty soon and that will tell the story I'm sure.

Whats the best measure recourse....go to a taller/smaller powder column (rather than wider shorter column?

regards

Paul
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Old 11-20-2005, 09:24   #42
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Hi Paul.

When my column isn't nearly full and I forget to tap it before the throw, I have been off as much as .2 gr. To me (and I assume most others), that's WAY too much. The recently installed baffel helps, but I haven't come to trust it yet. Under the best conditions and when I'm doing my part, It's much better...but I have resorted to weighing each charge now when I use 800x. I haven't completely given up, but since my mother-in-law is bugging me about what she should get me for X-Mas (bless her soul ), I have been seriously thinking of hinting towards a electronic scale/dispenser.
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Old 11-20-2005, 23:29   #43
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IMR Powder data...

Rigormootis

Sorry, I wasn't very clear...what I was wondering, was if the diameter of the metering bar (column or cylinder or what have you) made any difference. I know that large diameter bars can be a problem for smaller charges and if I remember right, thats why you want to use the small bar for the smaller charges in the Dillion, to help with consistancy. You could use the larger bar and reduce the chamber area, but it just doesn't throw as consistant. Also why you want to use the RCBS pistol measure head, rather than the rifle head....same reason.

But I haven't messed with the 800X that much to see what kind of difference it makes. As large as the flakes are, I am thinking it will help some, but that it will be good enough, I don't know. I am using the small powder bar now, in my Dillion for the 10mm but I bet it's none to good due to the flake size. I DO watch for a powder bridge with 800x...I think you could hang a charge or part there of, with this powder. Possibly not, but I wouldn't want to bank on it.

Your probably right in saying the best solution may be the electronic settup.

Sounds like a very nice mother-in-law....that's as good as it gets !

Paul
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Old 11-21-2005, 15:16   #44
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Got it. I actually am using the smaller bar...but the combo of it and the baffle does actually seem to be working better. To some extent, I am also just looking for a new toy. Yep, my in-laws are pretty great.
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Old 05-24-2006, 23:49   #45
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Shot some 180gr XTP's over 10.0gr of 800X and CCI mag primers out of the new 6" Storm Lake barrel in the G20 today.

Temp was 85 degrees, 2100ft elevation.

30 round average was 1420 fps. If my math is correct that equals 806 fpe.

No pressure signs at all.
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Old 05-26-2006, 23:18   #46
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IMR Powder data

Lennyjoe

AND NO Glock smiles

I have GOT to give that load a try......guess I should, with a gallon of 800X sitting here looking at me screaming load me, load me !

Paul
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Old 06-23-2006, 16:49   #47
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1420fps?

That's a pretty ideal velocity. I know that the supersonic/subsonic transition doesn't matter as much for these wide, heavy bullets, but that's still supersonic at 100 yards

http://www.realguns.com/calc/exteriorballistics
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Old 07-04-2006, 14:01   #48
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Shot some more rounds today out of the 6" Storm lake barrel.

Elevation 1800ft, temp was 89 degrees.

180gr XTP over 10.5gr 800X and CCI mag primers. Only shot 5 of each.
1460
1439
1454
1469
1482

200gr XTP and 800X

9.0gr
1305
1317
1268
1278
1292

9.3gr
1328
1306
1306
1317
1312

9.6gr
1379
1335
1403
1395
1378

The 9.3gr load was the most accurate at 25yds. All brass and primers showed no signs of overpressure. The Storm Lake chamber give the brass little opportunity to expand due to its tight tolerance. No such thing as Glocksmiles with the Storm Lake barrel.
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Old 07-04-2006, 15:19   #49
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IMR Powder data

Lennyjoe

Nice job !

Darn it's hard to beat the performance of 800X

I too have yet to get smiles out of my Storm Lake barrels.

Takes a lot of the worry out of it for me.

thanks Lenny

nice data

Paul
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Old 07-04-2006, 23:15   #50
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Yea, the 9.6 gr averaged 1378fps and 843fpe!!! That's a pretty darn good hunting load in my eyes.

It was a joy to shoot today. Even with a 22lb spring the brass went flying about 15 feet. Guys next to me were getting a bit on edge with the blast and brass flight.
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