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Old 01-08-2010, 22:32   #21
fsqridah
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In my G29 I carry 155gr DT Gold Dots. If I had a G20, I'd probably go with 165 grainers for normal use and 180s during the winter. For home defense, get the 230gr Equalizers. It's a 95gr lead ball with a 135gr Nosler sitting on top of it. At normal HD ranges, the difference in impact between the two projectiles is less than an inch. One shot, two holes. Also lightens things up so you're looking at less drywall penetration. The recoil is also very minimal compared to the 155-165gr loads.

For a hunting sidearm, will it be used for finishing shots, or as a backup in case you get charged by a dangerous animal? For finishing shots that are put through the animal's brain at five feet, pretty much anything will work. If you wanna be able to put down a charging animal, probably want 200gr XTPs if you're shooting from a factory barrel. If you can upgrade to a barrel with conventional rifling, the 200gr WFNGC bullets are great, especially if you combine them with a 6" hunting barrel.
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Old 01-09-2010, 01:53   #22
mongo356
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Quote:
Originally Posted by DocKWL View Post
My testing has shown that their velocity numbers are skewed, and performance is erratic at best. I have fired rounds from the same box which have showed signs of over pressure as well as squibs.
Ditto-
Some of the fired DT cases were leaving a visable smiley on the case & you could feel the nickle had cracked w/ your finger nail. I don't care to push the edge that close. I have had real good luck with Hornady ammo though. The fired Hornady cases & my re-loads don't leave a bluge. Everyone has their own opinion but the XTP bullet is hard to beat. These are some numbers fired through my stock G20.

06-16-08
Shooting Chrony Chronograph
83 Deg/650 ft above sea level
Glock 20 4.6”bbl

Double Tap 10mm Gold Dot-165gr-
(advertised 1400fps-G20-4.6”bbl)
1390
1343
1333
1390
1355
------- 1362.2 AVG/ 57fps E/S

Double Tap 10mm Gold Dot 180gr
(advertised 1300fps-G20-4.6”bbl)
1226
1250
1220
1205
1253
------1231 AVG/ 47.45 fps E/S

Remington Factory180 TMC
(advertised 1150fps-5”bbl)
1071
1055
1053
1068
1097
-------1069 AVG/ 44.56 fps E/S

Handload 200gr XTP
Win case/WLP primer/12.3gr AA#9
1059
1063
1064
1068
1055
------1068 AVG/ 12.58 fps E/S

02-10-09 Shooting Chrony Chronograph
68 Deg/650 ft above sea level
G20 4.6” Hornady Factory 200gr XTP
(Advertised 1050fps-5”bbl)
1010
1006
1002
1005
990
------1003 AVG/ 20 fps E/S

04-01-09 Shooting Chrony Chronograph
70 Deg/650 ft above sea level
G20 4.6” Hornady Factory 180gr XTP(Advertised 1180fps-5”bbl)
1186
1180
1189
------
------
------1185 AVG/ 9 fps E/S

Last edited by mongo356; 01-09-2010 at 02:03..
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Old 01-09-2010, 13:20   #23
Sierra9
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[quote=mongo356;14508388]Ditto-
Some of the fired DT cases were leaving a visable smiley on the case & you could feel the nickle had cracked w/ your finger nail. I don't care to push the edge that close. I have had real good luck with Hornady ammo though. The fired Hornady cases & my re-loads don't leave a bluge. Everyone has their own opinion but the XTP bullet is hard to beat. These are some numbers fired through my stock G20.

According to Mike McNett, he does his chrono testing outside of Cedar City, UT, at an elevation way over 6000 ft. You're nearly at sea level. I don't pretend to know how much of a difference this makes, but it's got to be some diff.
I for one have never seen any signs of over pressure or cracking of the nickle in well over a thousand rounds of 9mm and of 10mm Double Tap, and I do check because I've been reloading the cases. And if I did see such problems, I would sure as heck talk to Mike. Have you?
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Old 01-09-2010, 15:56   #24
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Quote:
Originally Posted by Sierra9 View Post
According to Mike McNett, he does his chrono testing outside of Cedar City, UT, at an elevation way over 6000 ft. You're nearly at sea level. I don't pretend to know how much of a difference this makes, but it's got to be some diff.
I for one have never seen any signs of over pressure or cracking of the nickle in well over a thousand rounds of 9mm and of 10mm Double Tap, and I do check because I've been reloading the cases. And if I did see such problems, I would sure as heck talk to Mike. Have you?
Nope. I did try a couple of different lot#'s to see if I maybe got a bad bunch. The nickel cracking was off and on, but the giant bulge was still there, to the point I couldn't re-load them.

In the end I came to the conclusion that anything I shoot won't be able to tell the difference in a 100ft a second or so anyway...if I was cutting it that close I need to either shoot better or get a bigger gun-lol. Also I didn't want one of the bulging rounds to blow apart at the worst possible moment making a reliable gun into a paperweight, I.E. shooting at charging hog, buffalo, elephant, etc.

I believe the elevation may have a lot to do with the chrono numbers, as well as other factors, temp, instruments used etc. Keep in mind this is just my experience with the ammo not necessarily written in stone for everyone.

I decided to just go to the XTP's they have always worked good for me. Most of the time I can roll my own cheaper so I have been doing that.
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Old 01-09-2010, 16:06   #25
Iceman cHucK
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I have consistently chronoed DT at 100-150fps below advertised in many of his 10mm loads. I'm in western PA at approx 1300'.
Does anyone know how to calibrate the fps expected by altitude in say 1000' increments? Could this explain the differences many of us see. I had no idea DT was at this 6000' + altitude!
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Old 01-09-2010, 16:10   #26
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I also do not know why everyone praises DT ammunition so much. I got terrible accuracy with the ammunition that I tried, although as everyone knows a good shooting load in one gun does not mean it will shoot good in another gun, but it may mean that the ammunition has a large standard deviation. I do not know for sure as I did not chrono them.

DT ammunition is the only ammunition that has given me "guppy brass." I will not shoot ammunition that IMO is loaded to too high pressures.
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Old 01-09-2010, 16:13   #27
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Quote:
Originally Posted by Iceman cHucK View Post
Does anyone know how to calibrate the fps expected by altitude in say 1000' increments? Could this explain the differences many of us see. I had no idea DT was at this 6000' + altitude!
That is certainly a good/valid theory but any factory ammunition should be loaded so that it does not exceed SAAMI specs ( I would also think that they would want to load to a slightly lower pressure to cover their arse) when fired at any reasonable altitude, I would assume that sea level would serve as the benchmark.
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Old 01-09-2010, 18:50   #28
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[quote=mongo356;14511362]Nope. I did try a couple of different lot#'s to see if I maybe got a bad bunch. The nickel cracking was off and on, but the giant bulge was still there, to the point I couldn't re-load them.


You shoot 10mm out of a g20. I have a g29. Is there any difference in the barrel that would give you those problems and not me?
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