Glock constantly chokes on 115gr range ammo but runs flawless with defensive ammo

1443 Views 46 Replies 20 Participants Last post by Bigfoot7262, 3 d ago

glockguy462

Discussion Starter · 1 mo ago

Been a while since I shot my Glock 26.5 which I had issues with right out of the box, lots of nose up failure to feeds. I suspected the original issue was maybe a faulty recoil spring assembly and I finally got around to buying another OEM one from Midway, but I have the same issue with failure to feed every few rounds. I swapped back to the original recoil spring and things are even worse than before (might just be due to not cleaning for a while, although I have well under 1k rounds through this gun so shouldn't matter IMO).

Gun completely stock/no mods. Been stripped and cleaned several times.
Roughly 400 rounds of CCI blazer brass 115gr and LAXammo 115gr through it, with regular malfunctions. Managed to make it through 50 rounds without malfunction at one point but now I get FTF at least once per 10rd magazine.
Tried multiple mags including known good Glock 19 mags, same behavior
Shot slightly over 100 rounds of defensive ammo, no malfunctions at all. (Federal HST 147gr std pressure, Hornady Critical Defense 135gr +P, underwood xtreme penetrator 115gr +P). All of these had noticeably more recoil (duh) than the range ammo, makes me think the range ammo is too underpowered.
My Glock 19 runs completely fine with the same batch of CCI Blazer and LAX ammo

This is starting to drive me nuts, I might buy a weaker recoil spring and see if that helps run the weaker stuff better. I also might buy some hotter range ammo (plus 124gr instead of 115), I heard S&B tends to be hotter than Blazer Brass. Anyone else have issues with 115gr in their G26?

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1 - 20 of 47 Posts

alpha-omega

· #2 · 1 mo ago

have you switched mags, to make sure it's not a magazine malfunction? If you know it's not that, maybe the steel cased ammo, carbon really makes them sticky.

Reactions: 1

Sabachka

· #3 · 1 mo ago

I've had two gen 5 models (not the 26) that had problems cycling ammo and I'm absolutely certain it was due to this double recoil spring assembly Glock is using...never had these problems with the Gen 3 single spring recoil assembly...

Try cycling the slide 4-500 times the next time you're sitting around watching TV (during commercials) then lock the slide back and leave it that way overnight and see if that helps to break it in.

Reactions: 2

alpha-omega

· #4 · 1 mo ago

My G45 gen5 has no issues at all, with any ammo.

Reactions: 1

SixG17s

· #5 · 1 mo ago

115's are too weak to cycle the double spring. And LAX is junk anyway.

Reactions: 5

202

· #6 · 1 mo ago

Sabachka said:
I've had two gen 5 models (not the 26) that had problems cycling ammo and I'm absolutely certain it was due to this double recoil spring assembly Glock is using...never had these problems with the Gen 3 single spring recoil assembly...

Try cycling the slide 4-500 times the next time you're sitting around watching TV (during commercials) then lock the slide back and leave it that way overnight and see if that helps to break it in.

The Gen 3 Glock 26s use a double recoil spring assembly too.

Reactions: 2

202

· #7 · 1 mo ago

Could it be limp wristing?
I never had an issue with my Glock 26.

Reactions: 3

Sabachka

· #8 · 1 mo ago

202 said:
The Gen 3 Glock 26s use a double recoil spring assembly too.

You are correct I was thinking about the 19.

Reactions: 3

Lucian_253

· #9 · 1 mo ago

Sabachka said:
I've had two gen 5 models (not the 26) that had problems cycling ammo and I'm absolutely certain it was due to this double recoil spring assembly Glock is using...never had these problems with the Gen 3 single spring recoil assembly...

Try cycling the slide 4-500 times the next time you're sitting around watching TV (during commercials) then lock the slide back and leave it that way overnight and see if that helps to break it in.

The gen.4’s also have the dual recoil spring assembly.

Reactions: 2

RevV

· #10 · 1 mo ago

Glockguy462, I'm sorry to hear about the issue you are having. My G26.5 eats everything I've tried, including cheap steel case 115 gr. factory ammo.

To get good, full cycling, I do load my 115 gr. bullets a little hotter than is necessary for some other 9mm guns. Same with 185 gr. bullets in a G30.4.

Perhaps it's a brake in issue that is only seen with weakly charged, light bullets. (I know Glock says they have no break in period, and I don't want to get into that debate.)

Sabachka's tips (post #3) might loosen the RSA a bit.

Maybe call Glock and tell them what you are experiencing.

Good luck!

Reactions: 1

Sabachka

· #11 · 1 mo ago

Lucian_253 said:
The gen.4’s also have the dual recoil spring assembly.

Okay.....

Reactions: 2

Che

· #12 · 30 d ago

202 said:
Could it be limp wristing?
I never had an issue with my Glock 26.

I’m thinking the same thing, re: limp wristing.

Also the OP has a G19 and my wife had the same problem. Accustom to the G19 when she started shooting the G26 she was limp wristing it.

Reactions: 2

Che

· #13 · 30 d ago

LAX Ammo had a great deal on Winchester 124 grain NATO and I used that to break in my G26 Gen 3. My EDC is the Winchester 147 grain JHP.

Reactions: 1

Jdmatt2

· #14 · 30 d ago

glockguy462 said:
Been a while since I shot my Glock 26.5 which I had issues with right out of the box, lots of nose up failure to feeds. I suspected the original issue was maybe a faulty recoil spring assembly and I finally got around to buying another OEM one from Midway, but I have the same issue with failure to feed every few rounds. I swapped back to the original recoil spring and things are even worse than before (might just be due to not cleaning for a while, although I have well under 1k rounds through this gun so shouldn't matter IMO).

Gun completely stock/no mods. Been stripped and cleaned several times.

Roughly 400 rounds of CCI blazer brass 115gr and LAXammo 115gr through it, with regular malfunctions. Managed to make it through 50 rounds without malfunction at one point but now I get FTF at least once per 10rd magazine.

Tried multiple mags including known good Glock 19 mags, same behavior

Shot slightly over 100 rounds of defensive ammo, no malfunctions at all. (Federal HST 147gr std pressure, Hornady Critical Defense 135gr +P, underwood xtreme penetrator 115gr +P). All of these had noticeably more recoil (duh) than the range ammo, makes me think the range ammo is too underpowered.

My Glock 19 runs completely fine with the same batch of CCI Blazer and LAX ammo

This is starting to drive me nuts, I might buy a weaker recoil spring and see if that helps run the weaker stuff better. I also might buy some hotter range ammo (plus 124gr instead of 115), I heard S&B tends to be hotter than Blazer Brass. Anyone else have issues with 115gr in their G26?

glockguy462 said:
Been a while since I shot my Glock 26.5 which I had issues with right out of the box, lots of nose up failure to feeds. I suspected the original issue was maybe a faulty recoil spring assembly and I finally got around to buying another OEM one from Midway, but I have the same issue with failure to feed every few rounds. I swapped back to the original recoil spring and things are even worse than before (might just be due to not cleaning for a while, although I have well under 1k rounds through this gun so shouldn't matter IMO).

Gun completely stock/no mods. Been stripped and cleaned several times.

Roughly 400 rounds of CCI blazer brass 115gr and LAXammo 115gr through it, with regular malfunctions. Managed to make it through 50 rounds without malfunction at one point but now I get FTF at least once per 10rd magazine.

Tried multiple mags including known good Glock 19 mags, same behavior

Shot slightly over 100 rounds of defensive ammo, no malfunctions at all. (Federal HST 147gr std pressure, Hornady Critical Defense 135gr +P, underwood xtreme penetrator 115gr +P). All of these had noticeably more recoil (duh) than the range ammo, makes me think the range ammo is too underpowered.

My Glock 19 runs completely fine with the same batch of CCI Blazer and LAX ammo

This is starting to drive me nuts, I might buy a weaker recoil spring and see if that helps run the weaker stuff better. I also might buy some hotter range ammo (plus 124gr instead of 115), I heard S&B tends to be hotter than Blazer Brass. Anyone else have issues with 115gr in their G26?

Hello I never really have had any issues with the 115 gr . Blazer although dependable range ammo really runs dirty. I love the S$B 124gr. Absolutely the best clean running ammo. for Carry I use the Critical duty 135gr +P. No issues either. Good Luck.

Reactions: 1

pr5992

· #15 · 30 d ago

Maybe try different ammo? I use S&B FML 124 grain for my G17, close to 10,000 rounds with zero malfunctions. Or take it to a good local Glock gunsmith.

Reactions: 2

Lucian_253

· #16 · 30 d ago

pr5992 said:
Maybe try different ammo? I use S&B FML 124 grain for my G17, close to 10,000 rounds with zero malfunctions. Or take it to a good local Glock gunsmith.

I don’t own any gen.5’s, but I’ve never had any issues with S&B in my Glocks either. I shoot a lot of S&B, & blazer brass 124gr for practice.

I have a question to gen.5 owners. Wasn’t part of the selling point on the gen.5 the marksmen barrel & slightly tighter tolerances? If so could some gen.5’s need a break in period? I am mostly a gen.3 guy. With a couple gen.4’s, & only 1 gen.2 left.

Reactions: 2

Lucian_253

· #17 · 30 d ago

Lucian_253 said:
I don’t own any gen.5’s, but I’ve never had any issues with S&B in my Glocks either. I shoot a lot of S&B, & blazer brass 124gr for practice.

I have a question to gen.5 owners. Wasn’t part of the selling point on the gen.5 the marksmen barrel & slightly tighter tolerances? If so could some gen.5’s need a break in period? I am mostly a gen.3 guy. With a couple gen.4’s, & only 1 gen.2 left.

www.pewpewtactical.com

Gen 5 Glocks: What's New With Our Favorite Gun?

After much waiting, Glock's Gen5 lineup has finally arrived. Check out the brand new Glock 17 and Glock 19 here and see what's new.

www.pewpewtactical.com

www.pewpewtactical.com

From linked article:

One of the more major upgrades to grace the Gen5 is the improved barrel design known as the Glock Marksman Barrel. According to Glock, this new barrel system continues using the same HEX rifling that made other Glock models accurate, but there’s a slight difference. The GMB design has tighter tolerances when compared to other Glock models, which is believed to help increase the gun’s accuracy.

Reactions: 3

SixG17s

· #18 · 30 d ago

S&B 124's are hot. 1,200 fps.

Reactions: 5

pr5992

· #19 · 30 d ago

SixG17s said:
S&B 124's are hot. 1,200 fps.

Yeah, it's good ammo, and not overly expensive. Here in CA I get 10 boxes every few weeks for $221.50 including tax. It is very consistent, never fails, and in terms of recoil it's pretty close to my defensive ammo, Hornady Critical Duty 147 grain. That is another advantage.

Reactions: 3

pr5992

· #20 · 30 d ago (Edited)

Lucian_253 said:
Gen 5 Glocks: What's New With Our Favorite Gun?

After much waiting, Glock's Gen5 lineup has finally arrived. Check out the brand new Glock 17 and Glock 19 here and see what's new.

www.pewpewtactical.com

From linked article:

One of the more major upgrades to grace the Gen5 is the improved barrel design known as the Glock Marksman Barrel. According to Glock, this new barrel system continues using the same HEX rifling that made other Glock models accurate, but there’s a slight difference. The GMB design has tighter tolerances when compared to other Glock models, which is believed to help increase the gun’s accuracy.

Interesting. That is all good and well but if that makes the G5 more finicky in terms of ammo, I am not a big fan. In the end of the day reliability is No. 1 and after all's said and done, it's still a handgun so unless you are Jerry Miculek you're never going to be super accurate at longer distances.

Reactions: 3

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