Stock Rxm failure to feed

[Prescott_native]

Hi folks,
At the range this morning, I had a few failures to feed about halfway through a full magazine (both new magpul and oem Glock magazines ). I was shooting from reset.

Ammo was brass 115 grain federal fmj. This was my second outing and round count is just under 300.

With each failure, the unfired cartridge would be nearly off the feed ramp and into the chamber yet still in a slightly vertical mid feed position, but the slide for whatever reason just didn’t want to come back into battery fully without a tap on the back from me and then would finally go all the way home.

I then tested with some carry ammo - 147 hst and 124 +p critical duty and there were no such issues through about 4 magazines of those.

I welcome limp wrist jokes and all that as that’s what I’d assume was the culprit if reading this, but I am an experienced shooter and have been carrying and shooting the Glock platform since 2012.

I had noticed through many dry fire sessions that when I would hold back the trigger and cycle the slide to practice some shooting from reset that unlike times when I fully let out the trigger before cycling that it would need a tap / slight encouragement to go back into battery fully. This was with snap caps.

My instinct is that a slightly stronger recoil spring will overcome this resistance and help the slide come back into battery and fully feed. I really love the way my rxm ejects brass in a no nonsense matter and I don’t think going with an oem glock recoil spring that would be slightly heavier (from sources I’ve read) would induce failures to eject -but I’d like to hear ideas on a fix here. I did already order an oem gen 3 Glock 19 recoil spring assembly.

Sorry for the long post , just trying to be specific to cover bases and get good feedback.

 

[s4s4u]

nvrmnd

 

[hittman]

Welcome to the forum

 

[p345Fan]

Try 124 gr ball and see if the problem persists. I have read elsewhere that 115 can be a problem for the RXM. I only use 124 in my 9’s anyway, except for the P365, which won’t shoot POA with the 124.

 

[XUSNORDIE]

The PSA Dagger had it's faults at first also.....then got worked out and still a good pistol at half the price and same mag influencer...

I love Ruger, own a few Glocks...built several Daggers and will still take a Dagger over a RXM (the ones I've handled/shot)....but in this category Glocks rule.....sorry, sort of.

 

[Prescott_native]

Try 124 gr ball and see if the problem persists. I have read elsewhere that 115 can be a problem for the RXM. I only use 124 in my 9’s anyway, except for the P365, which won’t shoot POA with the 124.

Thanks, I will definitely bring some next time. 124 is also what I typically shoot at the range, but I had some 115 to go through this time. My first range trip with this rxm was with 124 and there were no issues.

 

[Prescott_native]

The PSA Dagger had it's faults at first also.....then got worked out and still a good pistol at half the price and same mag influencer...

I love Ruger, own a few Glocks...built several Daggers and will still take a Dagger over a RXM (the ones I've handled/shot)....but in this category Glocks rule.....sorry, sort of.

Thanks, I really love the grip on the rxm and hope I can get this one running reliably with different ammo types.
I know what you mean though , my G 26 has never been fully dethroned through the years.

 

[Prescott_native]

Welcome to the forum

Thanks, I appreciate it!

 

[Prescott_native]

How "rested"? When the hand is not supporting the entire weight of the gun as well absorbing the recoil, variables are introduced that are not consistent with typical use.

Thanks, and I should have described better, but I simply meant that I was shooting from trigger reset. Keeping the trigger held back fully through the firing and recoil cycle then letting the trigger out to its reset point and then repeating and firing again.
This was a method I had trained with often for follow up shot scenarios but schools of thought of course change on this like many things.

 

[neilin]

“I then tested with some carry ammo - 147 hst and 124 +p critical duty and there were no such issues through about 4 magazines of those.”

If your carry ammo does not give you any issues, I would just shoot the carry ammo, and not mess with the gun. It is better to practice with carry ammo anyway, for in a defense situation you are then use to how your gun will react in a real life bad situation.
Additionally, I would not concern myself about reset. Squeeze the trigger and release fully on each shot. You may need to shoot an unfamiliar gun sometime with a different reset, revert to your practiced reset position, and experience failures. Just my thoughts.

 

[Sam Summey]

Call Ruger and explain the problem. Recoil spring could be be problem as you pointed out. Ruger will probably sent a replacement. 500 rounds may be a solution too. Inspect the problematic ammo and make sure that the case flare is totally removed. You can do this by laying a straight edge along side of the case and see it you observe a gap between the ends of the loaded round. Once a fellow bought 1000 rounds of Federal 45 ACP from Centerfire Systems that wouldn't chamber in his handgun. he brought the firearm and ammo for me to inspect. I didn't need a straight edge I could "eye ball" the latent flare. I installed a taper crimp die in my Hornady Lock n Load and in about an hour of so he had run all 1000 through the press, problem solved.

 

[hittman]

A $400 gun shouldn’t require $250 worth of ammo to break it in and make it operate properly.

If a product doesn’t work right out of the box, that’s a red flag.

 

[s4s4u]

It is better to practice with carry ammo anyway, for in a defense situation you are then use to how your gun will react in a real life bad situation.

While it would be great to practice with carry ammo, that can get a bit expensive for the average Joe. I practice with the same bullet weight as my defense ammo, but it is FMJ. Same load, different pill, same recoil and operations.

 

[Prescott_native]

Update , I found the ejector was pressing down hard on the top round of the magazine and causing the ftf. I had an extra gen 5 ejector from a spare trigger group and swapped. Rounds no longer being pressed hard down and after testing issue has been fully resolved.

 

[Dry154]

Sounds like classic shooting from reset syndrome on a new ish RXM the trigger bar is still engaged with the striker, adding just enough extra drag friction that the slide doesn't slam home hard on lighter loads your 115gr FMJ.
Real world fix from tons of RXM G19 owners
OEM Gen3 RSA what you ordered is the #1 cure it's a hair heavier stiffer than the factory RXM spring and almost always solves the reset cycle tap rack issue without causing over ejection or FTEs. Most guys report perfect function with 115gr after swapping.

Keep the gun well lubed slide rails, connector, barrel hood new guns are tight, and dry spots make the drag worse.

Limp wrist jokes aside you're experienced, we know, grip extra firm with 115gr until the RSA arrives it helps override the drag.

Your 147gr and P running flawless is the giveaway they cycle the slide harder.

You'll be 100% once that Gen3 spring breaks in 100-200 rounds. Common new Glock quirk, not a defect. Enjoy the RXM they're addicts once dialed.