Glock 34 loading for accuracy

[Siggy Stardust]

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.

I use the Hornady COL tool for rifles, but I've always wondered how to do this for pistols.

What is the prescribed method for doing so?

 

[Onagoth]

I use the Hornady COL tool for rifles, but I've always wondered how to do this for pistols.

What is the prescribed method for doing so?

Load a bullet into a fired casing where it fits snug... Make sure the oal is very long.

Remove the barrel from the gun and push the casing into the chamber by hand until the rim hits the end of the chamber... Carefully remove the cartridge and measure the oal.... Then deduct around 0.02"

 

[RePete]

What projectiles are you using?

Xtreme's, CamPro's and Frontiers. No problems with any of them for accuracy.

 

[4n2t0]

I use the Hornady COL tool for rifles, but I've always wondered how to do this for pistols.

What is the prescribed method for doing so?

Easy peasy...

 

[4n2t0]

Most people have problems with the CZ, so measure the longest OAL the CZ with accept and it should work for most other handguns. My G34 likes 1.14 with no crimp, just de-bell.

 

[4n2t0]

Just load to the shortest chamber.

I run 147 plated and TG (I prefer Unique, but can't get it), loaded to 1.15".

Shot from 2 G34"s.

Taking a ride on 3.2-3.4 of TG?

That gets me around 131-137 PF and 910-940 FPS.

 

[Onagoth]

I just checked the 147s in my G34 chamber...I could load them to 1.2 and still have them chamber.

The chambers are pretty forgiving on glocks as far as I can tell.

 

[RePete]

Taking a ride on 3.2-3.4 of TG?

That gets me around 131-137 PF and 910-940 FPS.

3.3 is all it takes.

 

[john92awd]

Out of curiosity, what are you considering a poor grouping while rested?