by ThatBlueJKU » Fri Jul 01, 2022 4:40 pm
I have recently purchased a PF940C frame and a Patmos Glock 23 slide. I had an issue where the slide fit really tight on the front rails and was failing to feed. Sent the slide back and just received a new one. It’s still failing to feed. The round stops nose up in the chamber and stuck to the breach face just below the striker. I’ve changed the striker, extractor plunger, extractor, recoils spring and rails. I’ve also tried a combination of all the above parts and the parts that came with the slide. It still fails to feed until the magazine gets down to 3-4 rounds left (I’ve tried different mags , Glock and magpul w/Glock followers) if I hit the bottom of the mag it will finally chamber but if I try to eject it feels like the round is stuck. Any help is appreciated and I can take pics among request. Thanks
by ThatBlueJKU » Fri Jul 15, 2022 5:24 pm
Hawkeye wrote: ↑Fri Jul 15, 2022 3:44 pmWow, and there loose in the magwell? If you can get it to feed by moving the magazine around, it's got to be one of two things. Magazine or feed ramp on the barrel. This is assuming the ammo is good stuff. I had a build a couple of years back that acted like this (not feeding) even Glock magazine was supper loose. When I put a cheap aluminum magwell on it that had to be hand fitted for Glock mags (Glock mag would not seat) so after hand fitting for Glock mag it had a tight seat that locked in tight, I didn't have a feed problem anymore. It could be the rough injector not letting the case to move up. Are there any marks on the primer end of the cases? you may need to dull some of the sharp edges on the injector. OH, how much paint is on the firing pin end of the slide where the case sits? I have had paint build up keeping the case from seating. That can cause the same problem. This sounds like one of those things that can be several things all together that cause it. You fix one thing, feeding gets better but not 100% then fix another and another then it starts to ware in. One thing is your close to a 100% just keep trouble shooting after all it does shoot, it can't be a major problem No paint on the breach face. I’m probably gonna order a mag well soon. I’ve shot hornadys and Blazer through it. May pick up so federal and Winchester this weekend and try again. The ejector is the wrong one but I have the correct one on the way. We will keep replacing things till it’s right.
by Hawkeye » Fri Jul 15, 2022 3:44 pm Wow, and there loose in the magwell? If you can get it to feed by moving the magazine around, it's got to be one of two things. Magazine or feed ramp on the barrel. This is assuming the ammo is good stuff. I had a build a couple of years back that acted like this (not feeding) even Glock magazine was supper loose. When I put a cheap aluminum magwell on it that had to be hand fitted for Glock mags (Glock mag would not seat) so after hand fitting for Glock mag it had a tight seat that locked in tight, I didn't have a feed problem anymore. It could be the rough injector not letting the case to move up. Are there any marks on the primer end of the cases? you may need to dull some of the sharp edges on the injector. OH, how much paint is on the firing pin end of the slide where the case sits? I have had paint build up keeping the case from seating. That can cause the same problem. This sounds like one of those things that can be several things all together that cause it. You fix one thing, feeding gets better but not 100% then fix another and another then it starts to ware in. One thing is your close to a 100% just keep trouble shooting after all it does shoot, it can't be a major problem
by ThatBlueJKU » Fri Jul 15, 2022 1:25 pm
Hawkeye wrote: ↑Fri Jul 15, 2022 10:50 amWhat brand magazines are you using? If it shoots better when you wiggle the magazine that could be the problem with feeding. I’m using OEM Glock 23 mags.
What brand magazines are you using? If it shoots better when you wiggle the magazine that could be the problem with feeding.
by ThatBlueJKU » Fri Jul 15, 2022 6:12 am
Ordered a 40 trigger housing with the correct ejector, 40 LCI extractor with the 40 LCI bearing, extractor plunger and spring. All Glock OEM parts. If that doesn’t help. I’ll polish the feed ramp. If all else fails I’ll put a new barrel in it. Wish me luck
by ThatBlueJKU » Thu Jul 14, 2022 3:15 pm Put 150 round through it today. Had a bunch of feed issues until I pulled down and pushed the bottom of the mag towards the front of the gun. Fed perfect. Shot perfect with the occasional fail to eject but that could be the ejector (9 mm ejector). Also firm (death) grip on the gun seems to help a lot too. Not sure what that could be.
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by ThatBlueJKU » Sun Jul 03, 2022 1:23 pm
Threw in some dummy rounds and they cycle fine. Tried some plinking rounds and they cycle in fine. Finally tried the hornadys again and now they cycle fine. Not sure what’s up with it. Gonna clean the frame and channel up. Not sure what’s going on
by Ancient Order » Sat Jul 02, 2022 2:40 pm
I've had this problem on a couple builds, even when using OEM and high quality aftermarket slides, barrels, etc. Most likely, the problem will disappear during the troubleshooting process. Start with fixing the known issues. The channel definitely needs to be profiled better and cleaned up. Looks like the recoil spring has been chewing on it. Also, that RSA looks a little "twisty" when installed. I've found there's a TON of variation in RSA length even between so-called "OEM" RSA's. If you have the ability, pick up a couple of different RSA's to swap in/out. Glock part number 2457 (marked 5593-1). Is your slide still tight? Not clear after you got the replacement slide. Check your rails for level and stone them if necessary. For my builds, stoning the rails is ALWAYS necessary, even with Rook rails. I want all the high points identified and smoothed out. Sometimes it might be necessary to lap the rail channels on the slide. I do this with some 800-1000 grit wet sandpaper. Just a few passes is usually all it takes to smooth it out. BTW - racking your slide a gazillion times does the same thing, and is highly recommended. Good catch by WEAPONXYZ - that trigger spring is definitely upside down. You might also polish that feed ramp. I had this problem on one gun and it came down to some left over "gunk" in the extractor depressor plunger channel on the slide. When taking it out one time, I noticed it hung up a little bit. I took a wooden q-tip dowel and slid it into the channel and knocked loose some stuff. Sprayed a little ballistol down the hole then blew it out good. Problem fixed. Looks like you switched between Non-LCI and LCI extractors. Make sure you have the correct bearing installed. Have patience and enjoy the troubleshooting!
by WE4PONXYZ » Sat Jul 02, 2022 10:03 am
As suggested, the channel and rail tabs looks like they still need to be cleaned up a bit. Start with course low grit dry I do like 120-800 then switch to Wet sand high grit sandpaper 1k-3k. Here’s some great pf940c reference photos with notes. These all show examples of perfect channels and tabs. It also appears as your trigger spring may be in upside down, when installed it should look like an “S” laying on its face. https://imgur.com/a/b0LLIis
by sailman » Sat Jul 02, 2022 9:56 am
Clean up and then Polish that channel, And then go from there. This is the channel on the 26 size frame that I just completed. Also take out your guide rod and try to Polish the edges on the Spring. You're just going to make sure there are no sharp edges or birds on the Spring.
by 1791 bill of rights » Fri Jul 01, 2022 11:28 pm
IS that dummy rounds or real round and yeah I don't think the Patmos is top notch. I have two slides I use on one frame the patmos has had issues with OEM glock barrel. The ST dumny rounds had a batch or batches that are out of spec and don't work in most set ups
by ThatBlueJKU » Fri Jul 01, 2022 8:14 pm
by RAMjetta » Fri Jul 01, 2022 8:03 pm
Yeas please share pics of it together and with the slide off.
JettaMan OUT!
by ThatBlueJKU » Fri Jul 01, 2022 6:54 pm
Pulled extractor and tried again. Still fail to feed. Round is getting caught and wedged in the chamber