Glock 34 accuracy

[bates]

I spendt yesterday afternoon at the range shooting my gen 3 glock 17 and 34

I haven't had the 34 long and haven't been real impressed with it's grouping to date I thought it was me until now.

I started with shooting for accuracy I shot 7, 10, 15 and 25 yards with each pistol and then swapped out slides and frames and shot again

I didn't take pics but the difference is night and day I am very happy with my 17 but the 34 is now where near as accurate as the 17. I bought the 34 for competitions but it's staying home now

Easily 2x the group size and got worse as distance increased. As stated I swapped frames to be sure it wasn't a trigger or other issue.

Is my only option a new barrel?

Both guns have captured guide spring, and ghost 3.5 trigger bar n spring kit

I'm getting a can soon so I was due for a threaded barrel but im very disappointed in the 34

I've had extensive stippling done and don't see selling an option

Thanks

[jhr1986]

What size groups are you getting with the 34 at 15 and 25 yards?

[bates]

6 inches at 25

3 ish at 15

I would say

[T2C]

You may have to shoot different ammunition to learn what your Glock 34 will shoot accurately.

I pulled some data from my Glock 34 log. On one of my outings to test ammunition, I tested 4 different factory cartridges at 25 yards. The temperature was 80 degrees at the time of the test. Groups were fired at a bullseye target using a 2 handed grip.

Winchester 115g FMJ - 10 shot group @ 5"

RWS 124g FMJ - 10 shot group @ 4-3/4"

PMC 115g FMJ - 10 shot group @ 2-3/4"

S&B 115g FMJ - 10 shot group @ 2-1/2"


The best I could do with my reloads was 4-1/2".

I am much more proficient with my Glock 17, so I sold the Glock 34 to a friend.

[okie john]

You may have to shoot different ammunition to learn what your Glock 34 will shoot accurately.

This.

Ammo DEFINITELY makes a difference. Switching from one load to another can reduce groups by 50% or more.


Okie John

[samuse]

I tried 34s twice back when I used to shoot competition and they sucked horribly for me.

Sell it and move on...

[teutonicpolymer]

34s are the gold standard for USPSA/IPSC production along with the CZ Shadows

Try different ammo and if that fails and you want to keep it, try a KKM barrel or something

They can be very accurate guns but ammo selection can affect it a lot

[Up1911fan]

Same sight's on both?

[bates]

Yes same sights

Warrens with fiber. Exact rear but higher on the 34

I'll try some ammo

But I feel if the gun doesn't shoot something's up

Naturally some should be better but it's unacceptable as is

[Ron3]

I'm not a regular competitor or anything but like a lot of folks I'm not any better with the Glock 34 or 35 than with a G19 or G22.

So I don't know what else to tell you. Maybe someone here can help.

[125 mph]

Do you reload at all? I've found most of my glocks like 124 gr hornady round nose fmjs. I can PM you the load data I use if you're interested.

[Business_Casual]

You aren't happy with 6" at 25 yards? If that were 10 rounds, I would be.

[Tigereye]

There should be really good info at Brianenos.com in the forums.

[mizer67]

You aren't happy with 6" at 25 yards? If that were 10 rounds, I would be.

We all have different standards, but 6" at 25 yards for 10-rounds is not acceptable for a service pistol.

3" or less for 10-rounds at 25 yards when fired from a rest should be a minimum standard, in my opinion, for a service pistol and preferrably 2.5" or less.

To the OP - can you measure the barrel to slide fit? In my experience with recent Glocks, it should be ~.004" or less. Most of mine measure between .004" and .003".

[Psalms144.1]

I have a 2012 Gen4 G19 that is completely inconsistent with regards to accuracy. When I say that, I mean that I'm capable of shooting 4-5 out of 5 rounds into a 3x5 card with my G23, G30S, P2000, P30, etc at 25 yards. With this Glock, I will sometimes get that level of performance, and sometimes shoot shotgun groups. Or I'll get four on the card and the 5th will be 8-10" off. I tried a KKM barrel, no help. I noticed during dry fire that the slide has A LOT of movement during the trigger press - rear of the slide lifts visibly then "snaps" down when the striker releases. Add to that, this Glock's trigger has a major issue with overtravel, so it's VERY hard NOT to influence the sights after the shot breaks.

I sent it back to the mothership for analysis, and they told me "it's in tolerance - Glocks are Combat pistols, not Target pistols."

I've really come to believe that you get what you pay for with Glocks. The tolerances built into the design are such that sometimes, you just get too much "slop" in the system, and an individual pistol will go out the door that just sucks. And, there's nothing Glock can do about it except replace the pistol (I know, I've had five G19s replaced since 2010).

What I'd do is take your G34 and shoot it for groups at 25 yards with 5 rounds of 115 gr, 124gr, and 147gr ammunition. Shoot the groups both off hand and rested. Keep the targets to send to Glock if necessary. DON'T spend hundreds of dollars chasing a "load" that provides acceptable accuracy in your $500 Glock - that's just throwing good money after bad. If it doesn't shoot inside 4" (preferably 3") rested with any of those loads, make GLOCK take it back for assessment. They won't want to. Make a fuss, talk to a supervisor. When they tell you it's "within tolerance" for a "combat pistol" you'll know what's what...

Regards,

Kevin

[CAVDOC]

My glock 19 with multiple types (fmj Lrn hp) ammo when I did some testing shot everything into sub three inches at 25 yards for ten shot groups. I would reasonable expect most any glock to do the same. I repeated the same testing with a 26 and the largest 10 shot 25 yard group was right at three inches. I have not yet shot my 42 that far but it is sub two inch ( fewer ammo types and only six round groups) at 15 yards. And all these guns are bone stock. If you are not getting these type groups with at least some of your guns it signals fundamental errors in technique. If you can with other guns but not the 34(including other glocks) it suggests there is something wrong with the 34

[T2C]

Try contacting Glock and ask what is their recommendation for the most accurate ammunition for your Glock 34.

[Eurodriver]

We all have different standards, but 6" at 25 yards for 10-rounds is not acceptable for a service pistol.

3" or less for 10-rounds at 25 yards when fired from a rest should be a minimum standard, in my opinion, for a service pistol and preferrably 2.5" or less.

To the OP - can you measure the barrel to slide fit? In my experience with recent Glocks, it should be ~.004" or less. Most of mine measure between .004" and .003".

This is correct, he speaks the truth.
Shooting the bullseye, aim like Babe Ruth
At 25 yards, hit that 3" circle,
Anything larger, you need glasses like Urkel.

[tonyxcom]

What is the standard procedure to measure barrel lockup?

[I922sParkCir]

Great question. I've seen this talked about several times, but I've never seen someone explain barrel lockup. Even after some searching I am left clueless. Hopefully someone provides some insight.

[mayonaise]

Glock won't likely give you an ammo recommendation.

That said, I've found that the 34's, 35's, 41's, to be tack drivers in the right hands. Longer slide handguns, in my experience are more sensitive to shooter input and ammo selection, especially shooting out to distance. Depending on ammo I've seen all four guns stack 5 shot groups at 25m. Some are more accurate than others naturally due to tolerance differences. Every now and then I'll see a stinker but those are rare.

[T2C]

Glock won't likely give you an ammo recommendation.

That said, I've found that the 34's, 35's, 41's, to be tack drivers in the right hands. Longer slide handguns, in my experience are more sensitive to shooter input and ammo selection, especially shooting out to distance. Depending on ammo I've seen all four guns stack 5 shot groups at 25m. Some are more accurate than others naturally due to tolerance differences. Every now and then I'll see a stinker but those are rare.


What is your recommendation for a Glock 34 cartridge?

[teutonicpolymer]

Try different ones and see what works

115 gr from one company may not work as well as 115 gr from another

One load that works well in Glock A may not group well in Glock B

[Pilgrim]

My G34 was disappointingly inaccurate also. I hit about the same with my 26 as I did with the 34!

I tried different ammo, different stances, even different shooters... Nope... traded it off towards a training class.

[teutonicpolymer]

I have gotten sub inch groups (from the bench) with a 26 at 25 yards so it isn't like the smaller guns are less accurate

[ST911]

My 9mm accuracy loads:
BHA loaded 124gr JHP-XTP, standard pressure
BHA loaded 147gr JHP-XTP
Hornady loaded 124gr JHP-XTP, #90242
Federal 147gr JHP, classic Hi-Shok #9MS