boomfab Posted October 12, 2017 Share Posted October 12, 2017 This is a brand new Glock G40 (10mm). This happens sporadically with several varieties of factory ammo...Hornady and Underwood. Maybe 1 in 25 rounds. I'm guessing ejector or extractor. Link to comment Share on other sites More sharing options...
GrumpyOne Posted October 13, 2017 Share Posted October 13, 2017 I would bet ejector. Link to comment Share on other sites More sharing options...
Chui Posted October 13, 2017 Share Posted October 13, 2017 How does it normally eject and extract?If it's like the Gen4 9mm pistols the Extractor was the issue. I'm looking at picking up a 10mm Glock within a week or two and was wondering if Apex Tactical makes a Failure Resistant Extractor for it. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Sarge Posted October 13, 2017 Share Posted October 13, 2017 Seems to be extracting but not ejecting. If it’s brand new I would clean it, lube the crap out of it and put another few hundred through it before calling if broke. Link to comment Share on other sites More sharing options...
cheby Posted October 13, 2017 Share Posted October 13, 2017 (edited) If you shoot hot 10mm ammo it WILL cause this malfunction. Underwood ammo (As well as many others that are similarly hot) will NOT work through the stock 10mm Glocks. You need to replace the recoil spring with this: http://www.glockmeister.com/Glockmeister-Stainless-Steel-Recoil-Spring-Assembly-for-Gen-4-20-21-40-41/productinfo/G4SS20CS/ I use the 24# spring assembly. Edited October 13, 2017 by cheby Link to comment Share on other sites More sharing options...
858 Posted October 13, 2017 Share Posted October 13, 2017 16 minutes ago, cheby said: If you shoot hot 10mm ammo it WILL cause this malfunction. Underwood ammo (As well as many others that are similarly hot) will NOT work through the stock 10mm Glocks. You need to replace the recoil spring with this: http://www.glockmeister.com/Glockmeister-Stainless-Steel-Recoil-Spring-Assembly-for-Gen-4-20-21-40-41/productinfo/G4SS20CS/ I use the 24# spring assembly. BS Link to comment Share on other sites More sharing options...
cheby Posted October 13, 2017 Share Posted October 13, 2017 (edited) 3 hours ago, 858 said: BS Ugh... I have personally tested various hot 10 mm ammo offerings including Buffalo Bore, Federal 180 Grain Trophy Bonded JSP, Double Tap (Various), Underwood (with Lehigh bullets), as well as several handloads in my research for the efficient outdoor ammo that works with semiauto pistol . I used two G20 Gen 4 and one G29 gen 4. The 200gr DT was the only ammo that was reliable enough. However, the velocity was only 1100f/s compared to 1300 advertised. So I think that ammo is close to .40SW actually. Everything else that was close or above 1300 would become less reliable especially shooting one handed (Which was a part of my testing). Reliability also depends on the bullet profile. For example the lehigh penetrator bullets appear to feed more reliably in Glocks. The point is each time you get to real 10mm velocity, reliability suffers. Most guys however, shoot a half a mag and think they are GTG... The heavy recoil springs improved this dramatically for me but still did not solve the issue completely.. You can read more about the issue here: https://pistol-forum.com/showthread.php?16503-HK-USP-45-field-pistol or here: https://pistol-forum.com/showthread.php?25552-10mm-200gr-Hardcast-Load Edited October 13, 2017 by cheby Link to comment Share on other sites More sharing options...
858 Posted October 13, 2017 Share Posted October 13, 2017 I have thousands of rounds of full boat 10mm through my G20. It is completely stock, no malfunctions. If your gun doesn't cycle full power ammo, call glock because something is wrong with it. Even glock is going to tell you hot ammo is fine. Link to comment Share on other sites More sharing options...
cheby Posted October 13, 2017 Share Posted October 13, 2017 26 minutes ago, 858 said: I have thousands of rounds of full boat 10mm through my G20. It is completely stock, no malfunctions. If your gun doesn't cycle full power ammo, call glock because something is wrong with it. Even glock is going to tell you hot ammo is fine. can you tell me what ammo you've been shooting? Link to comment Share on other sites More sharing options...
858 Posted October 13, 2017 Share Posted October 13, 2017 1 hour ago, cheby said: can you tell me what ammo you've been shooting? Mostly handloads but also SIG, Underwood, and Double Tap. All 180gr. My handloads are 180gr going 1250fps. OP should call Glock and have his pistol warrantied. Link to comment Share on other sites More sharing options...
boomfab Posted October 13, 2017 Author Share Posted October 13, 2017 I will swap in a new ejector and see if that helps. Link to comment Share on other sites More sharing options...
bladewurk Posted October 13, 2017 Share Posted October 13, 2017 my G20SF is 100% with Hot loads so far, it has 20 lb recoil spring Link to comment Share on other sites More sharing options...
jcc7x7 Posted October 14, 2017 Share Posted October 14, 2017 Glock 10mm works fine with both factory and chrono'd 1200fps loads (180gr) works fine with factory springs Agree the gun should be warrantied via Glock unless you like playing with it and want the After Market stuff for your self confidence. Link to comment Share on other sites More sharing options...
9x45 Posted October 16, 2017 Share Posted October 16, 2017 Hot 10s work better with a 22lb or 24lb spring. Assumes you are holding your gun like this? So that it's not a grip issue. Ejectors don't normally cause issues in Glocks. And it only occurs 1 in 25? Most likely shifting your grip. Link to comment Share on other sites More sharing options...
boomfab Posted October 16, 2017 Author Share Posted October 16, 2017 Yes I hold pistols with a thumbs forward grip. Link to comment Share on other sites More sharing options...
mickd1 Posted October 16, 2017 Share Posted October 16, 2017 lube the crap out of it and put another 500 hundred through it, Link to comment Share on other sites More sharing options...
9x45 Posted October 18, 2017 Share Posted October 18, 2017 All Glocks need oil, but not a break in. A dry Glock will slow the slide down. And we know that Aussies can't have 40 cal guns down under, right mate? That's why you guys run 357SIG for Limited Major.... Link to comment Share on other sites More sharing options...
boomfab Posted October 20, 2017 Author Share Posted October 20, 2017 I swapped in a brand new Glock ejector. It did not fix the issue. These malfunctions ONLY occur with VERY hot ammo (Hornady factory 180 gr XTP loads, all Underwood 180gr + hollow point loads) I do not have issues with mediocre ammo (FMJ practice ammo or Winchester 180gr Silvertips). Link to comment Share on other sites More sharing options...
Bkreutz Posted October 20, 2017 Share Posted October 20, 2017 2 minutes ago, boomfab said: I swapped in a brand new Glock ejector. It did not fix the issue. These malfunctions ONLY occur with VERY hot ammo (Hornady factory 180 gr XTP loads, all Underwood 180gr + hollow point loads) I do not have issues with mediocre ammo (FMJ practice ammo or Winchester 180gr Silvertips). I would think the extractor would have more to do with this failure than the ejector. Link to comment Share on other sites More sharing options...
cheby Posted October 20, 2017 Share Posted October 20, 2017 8 minutes ago, boomfab said: I swapped in a brand new Glock ejector. It did not fix the issue. These malfunctions ONLY occur with VERY hot ammo (Hornady factory 180 gr XTP loads, all Underwood 180gr + hollow point loads) I do not have issues with mediocre ammo (FMJ practice ammo or Winchester 180gr Silvertips). I am telling you it is a well known issue. Try to swap the recoil spring. Link to comment Share on other sites More sharing options...
858 Posted October 23, 2017 Share Posted October 23, 2017 Extractor. The heavier recoil spring is delaying the cycling long enough to allow extraction with a defective extractor. Call Glock and ask them to fix it. The gun should function 100% without changing recoil springs. Link to comment Share on other sites More sharing options...
boomfab Posted October 23, 2017 Author Share Posted October 23, 2017 I will swap in a new extractor, spring, bearing and plunger and see if the problem persists. I have some heavy recoil springs to try if the problem remains. Link to comment Share on other sites More sharing options...
DanL Posted October 24, 2017 Share Posted October 24, 2017 (edited) While I agree it should function stock. My G20 hits the hell out of you in the hand and did not become comfortable to shoot till I got a 24lb spring in it. With Doubletap hard casts and Federal Trophy Bonded stuff it still tosses the cases 10 ft. Edited October 24, 2017 by DanL Spelling Link to comment Share on other sites More sharing options...
boomfab Posted October 25, 2017 Author Share Posted October 25, 2017 I put in a brand new LCI extractor, spring, SL bearing and plunger from MidwayUSA. It certainly did HELP the problem. I only had one malfunction in 60 rds of hot ammo. I'll be trying the heavier recoil springs soon. Link to comment Share on other sites More sharing options...
boomfab Posted October 28, 2017 Author Share Posted October 28, 2017 I shot 100 rds of hot ammo with a 22 lb ISMI spring. No FTEs. I will try another 300 rounds of hot ammo with the 22 lbs spring. If not FTE's I will consider the problem solved. From what I have read, the G40 slide is thin walled and weighs a few ounces less than a G20 slide. This may be a reason more spring is needed on a G40. Link to comment Share on other sites More sharing options...
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