Glock 34 loading for accuracy

Onagoth

Onagoth

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Just wondering what your most accurate load recipe is...

I've been using 147s and titegroup, but off of a rest the results weren't stunning.... The Glock 34 barrel is 1:10 which I've read doesn't do so well with 147s?

Thanks in advance
 
john92awd said:
You also want to make power factor? Or that doesn't matter?
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Yes... The load has to make 125... But it can be strong if that produces better results.

Right now I'm loading 3.2gr of titegroup behind 147gr frontier round nose, which is around 127 power factor my g34
 
I would try some 124 grain bullets. Last time I tried both 124 and 147 in the same range trip, the 124s grouped better in both a G17 and cz.
I don't have an exact load sorry but 3.8 titegroup will get real close to 125pf in a G34
 
3.6 gr of Titegroup for 124 gr cast is all I need. The 124 gr bullets are actually 128 gr with alloy I use. At first I expected some poor results but surprisingly the accuracy was great from the very beginning. What I forgot to mention is that I use a Wolf barrel. Not sure if the barrel has any importance accuracy wise.
 
I have never been a fan of 147gr round noses for a few reasons. 147RN's have the longest length on the market and there are a lot of problems with that. As the bullet gets larger (and OAL stays the same) the internal volume inside the case decreases and shows a higher degree of variation. With that, I doubt your loads are a perfect 127 everytime. Probably more like 122-132 with an average of 127. That variation could be a source of inconsistency.

Furthermore, when you load bullets deeper in to the case, you have a greater chance of deforming them. Do this: measure the diameter of the base of the bullet you are loading using a micrometer. Using your press, insert the bullet into a freshly sized case. Now, pull the bullet and re-measure the base of the bullet. I'll bet it will be a few .0001's smaller. This deformation is a major reason why bullets loose accuracy and people observe greater accuracy with HP's and Hornady tapers the base on their XTP.

Also, Titegroup is a good powder, not a great powder for long distance accuracy. Titegroup is a very fast buring powder with average accuracy and delivers its advantage through reduced felt recoil allowing for faster follow up shots. Its not the powder to use for trying to generate 1" groups from 25m. It is ideally suited for practical shooter looking to make 90% of their shots from 18m away or less and take shots in quick succession.

If I were you and was concerned with accuracy I'd load those bullets as long as I could and switch to a powder like CFE Pistol, N330, or N340. You will notice increased recoil for the equivalent PF over using Titegroup but the trade-off will be tighter groups at distance.
 
Onagoth said:
1.1"


Can't pull a bullet right now but there is only the slightest of crimp on them
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1) As previously mentioned you might find that the bullet has resized so that the entire length of the seated portion is smaller that what it should be. If you can see ANY mark left behind by the crimping operation, you've crimped too much. Since the bullet has been resized smaller, it will have difficulty getting full engagement with the rifling in your barrel and accuracy goes to $hit. Set the crimp just light enough to remove any bell you applied to the case, nothing more is needed. Don't think of it as "crimping", instead you're just removing the bell. I don't measure straight walled pistol cases, I put the mouth of the case (along the bullet) against a straight edge and call it good.

2) I hate plated projectiles, just saying...

3) Try an OAL of 1.14

4) I hate plated projectiles, just saying...

5) Report back and let us know if any of this helped.

6) I hate plated projectiles, just saying...
 
I pulled a bullet tonight and there is the slightest impression left from the Lee FCD. I've since read that the FCD is not really ideal for 9mm.

I'll ditch the FCD, add the most modest taper crimp I can imagine (without impressing the bullet at all) and report back. I suppose it is also possible that 147s just don't work for my gun

I might consider a cheaper aftermarket barrel since I have 3k rounds of this ammo loaded up
 
Onagoth said:
I pulled a bullet tonight and there is the slightest impression left from the Lee FCD. I've since read that the FCD is not really ideal for 9mm.

I'll ditch the FCD, add the most modest taper crimp I can imagine (without impressing the bullet at all) and report back. I suppose it is also possible that 147s just don't work for my gun

I might consider a cheaper aftermarket barrel since I have 3k rounds of this ammo loaded up
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Wow, that's a really big test batch, lol. I bet your problems are crimp related. Did you plunk test the ammo?
 
I would bring that OAL out some, as mentioned to 1.12 or 1.13 to start. I load out to 1.14 with my Glock 17.
Pull your barrel out and do some testing on the bench, get the OAL to the point it engages the rifling, then bring it back out 0.02. So if it engages at 1.15, seat the bullets to 1.13 ish.
Some people will tell you 0.01, but i'm not a fan of running the slide and having it stick because the bullet is slightly engaged into the rifling.
The three guys I know who shoot Glock 34's use 124 grain. I don't know if that's because it's a better bullet for the rifling, or if they're cheap. It could be either or. :)
It's worth an experiment though, see which bullet is more accurate from a bench rest with you gun.
 
Ive loaded a lot of 147s for my G34 canpros, aim and likely one or 2 more that i cant remember. Always had good results with 147s and wsf or 231. I found that i had to run the canpro a bit shorter to get them to function properly. But all were plenty accurate. In all fairness though, i dont shoot a lot of bullseye. Pretty much all shot in action type shooting sports.
 
I don't want to go too long with them since they will be getting used in another gun.

Just gonna have to play around with it I guess
 
Onagoth said:
I don't want to go too long with them since they will be getting used in another gun.

Just gonna have to play around with it I guess
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Ah, the age old problem. I load all my 147's to 1.10 for this reason. It's most likely me messing up to cause accuracy issues, versus the 0.02 change in OAL. :)
 
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