MikieM Posted January 18, 2017 Share Posted January 18, 2017 I have a match this Saturday, and I'm having problems with the magazines for my STI DVC Open gun. Here's the problem. Two, or three, times in a magazine full of ammo I get a failure to feed. The nose of the bullet will lodge just underneath the barrel shroud and cause a jam. Is it because of a weak grip, ammo too short, or the magazines? I have three STI 170mm mags, all with Taran internals. I have tuned each one according to Dawson specs. My ammo's AOL is 1.125 inches. The gun is currently using a 7 pound recoil spring with no buff. I installed a 90 degree mount for the C-More and there are no ejection problems. Any ideas, or suggestions? Thanks, Mike. Link to comment Share on other sites More sharing options...
mitchiepinoy Posted January 18, 2017 Share Posted January 18, 2017 10 minutes ago, MikieM said: I have a match this Saturday, and I'm having problems with the magazines for my STI DVC Open gun. Here's the problem. Two, or three, times in a magazine full of ammo I get a failure to feed. The nose of the bullet will lodge just underneath the barrel shroud and cause a jam. Is it because of a weak grip, ammo too short, or the magazines? I have three STI 170mm mags, all with Taran internals. I have tuned each one according to Dawson specs. My ammo's AOL is 1.125 inches. The gun is currently using a 7 pound recoil spring with no buff. I installed a 90 degree mount for the C-More and there are no ejection problems. Any ideas, or suggestions? Thanks, Mike. Cheaper to change the 7lba recoil to 9 atleast... try it Link to comment Share on other sites More sharing options...
ChuckS Posted January 18, 2017 Share Posted January 18, 2017 Post a picture of what the jam looks like. Fake it if necessary... Link to comment Share on other sites More sharing options...
MikieM Posted January 18, 2017 Author Share Posted January 18, 2017 16 minutes ago, mitchiepinoy said: Cheaper to change the 7lba recoil to 9 atleast... try it It came with an 8, but I do have a 9 available. Do you think the slide is not closing fast enough? Link to comment Share on other sites More sharing options...
mitchiepinoy Posted January 18, 2017 Share Posted January 18, 2017 38 minutes ago, MikieM said: I have a match this Saturday, and I'm having problems with the magazines for my STI DVC Open gun. Here's the problem. Two, or three, times in a magazine full of ammo I get a failure to feed. The nose of the bullet will lodge just underneath the barrel shroud and cause a jam. Is it because of a weak grip, ammo too short, or the magazines? I have three STI 170mm mags, all with Taran internals. I have tuned each one according to Dawson specs. My ammo's AOL is 1.125 inches. The gun is currently using a 7 pound recoil spring with no buff. I installed a 90 degree mount for the C-More and there are no ejection problems. Any ideas, or suggestions? Thanks, Mike. Cheaper to change the 7lba recoil to 9 atleast... try it 10 minutes ago, MikieM said: It came with an 8, but I do have a 9 available. Do you think the slide is not closing fast enough? Possible... 7 too light especially when the slide is heavy... i run 9 minor and 11 in major. Link to comment Share on other sites More sharing options...
MikieM Posted January 18, 2017 Author Share Posted January 18, 2017 4 minutes ago, mitchiepinoy said: Cheaper to change the 7lba recoil to 9 atleast... try it Possible... 7 too light especially when the slide is heavy... i run 9 minor and 11 in major. Bear in mind this is the DVC. The slide has been lightened considerably. Link to comment Share on other sites More sharing options...
limited shtr Posted January 18, 2017 Share Posted January 18, 2017 Are you using spacers in the mags? load longer this helped all of my feeding issues ! Link to comment Share on other sites More sharing options...
Aircooled6racer Posted January 18, 2017 Share Posted January 18, 2017 Hello: Try a 8lb recoil spring. Check your grip screws are tight. Load to 1.160" OAL. Thanks, Eric Link to comment Share on other sites More sharing options...
Expflier Posted January 18, 2017 Share Posted January 18, 2017 (edited) Is it a 9 or 39sc? Is it a brand new gun and mags or did the issue just appear all of the sudden after being shot for awhile? all 3 mags doing exact same thing? Edited January 18, 2017 by Expflier . Link to comment Share on other sites More sharing options...
mscott Posted January 18, 2017 Share Posted January 18, 2017 I load my 9mm ammo to 1.165 Link to comment Share on other sites More sharing options...
mikev49 Posted January 18, 2017 Share Posted January 18, 2017 12 minutes ago, Aircooled6racer said: Hello: Try a 8lb recoil spring. Check your grip screws are tight. Load to 1.160" OAL. Thanks, Eric ^^^This. Especailly the part about checking to see that the grip has not loosed up or moved. If you are not running spacers in STI mags, you will have issues from time to time. If the top round is sitting too low and thus getting caught under the ramp, you may need to widen the front of the feed lips so that the top round sticks up a little more. In the future I would suggest loading a little longer. If you are not shooting major out of that gun your issue may be that the slide is not going back far enough. I know its sounds crazy that a 7 isn't letting the slide go all the way back but I have noticed that with 125 pf ammo, in my Limcat, that my MBX mags will do the same thing but STI mags run fine Link to comment Share on other sites More sharing options...
JMike Posted January 19, 2017 Share Posted January 19, 2017 I am assuming you are loading 9mm. If that is the case, as others have said, you are loading way too short! Load to an OAL of 1.16. Your 7 lb recoil spring should be just fine. Link to comment Share on other sites More sharing options...
Expflier Posted January 19, 2017 Share Posted January 19, 2017 That's why I was waiting for an answer to the questions. I had a Dvc 38sc and now own a Dvc 9. Link to comment Share on other sites More sharing options...
MikieM Posted January 19, 2017 Author Share Posted January 19, 2017 43 minutes ago, JMike said: I am assuming you are loading 9mm. If that is the case, as others have said, you are loading way too short! Load to an OAL of 1.16. Your 7 lb recoil spring should be just fine. Yes, 9mm. I've just loaded up 100 rounds at 1.165. I'll try them out tomorrow. Link to comment Share on other sites More sharing options...
JMike Posted January 19, 2017 Share Posted January 19, 2017 Those should work out much better for you. Are you loading to major PF? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted January 19, 2017 Share Posted January 19, 2017 1 hour ago, MikieM said: Yes, 9mm. I've just loaded up 100 rounds at 1.165. I'll try them out tomorrow. What is your load? Bullet? Powder? GRains of powder? Velocity? Link to comment Share on other sites More sharing options...
jnr88 Posted January 19, 2017 Share Posted January 19, 2017 (edited) 1.165 JHP with 7.3 Silhouette. 8# spring. Good luck. Edited January 19, 2017 by jnr88 Link to comment Share on other sites More sharing options...
gerritm Posted January 19, 2017 Share Posted January 19, 2017 7 hours ago, Hi-Power Jack said: What is your load? Bullet? Powder? GRains of powder? Velocity? This, what is your load & PF? I have played with several loads in my DVC & this will happen if I run them too light. gerritm Link to comment Share on other sites More sharing options...
cecil Posted January 19, 2017 Share Posted January 19, 2017 I have a STI DVC 9mm... l shoot 124gr Precision Delta bullets seated to 1.16.. using 6.6 gr autocomp.. 8lb variable spring... & grip your gun like a gorilla.. Link to comment Share on other sites More sharing options...
ano Posted January 19, 2017 Share Posted January 19, 2017 I run 7... Link to comment Share on other sites More sharing options...
theWacoKid Posted January 19, 2017 Share Posted January 19, 2017 1.125" is crazy short for major in a 2011. Don't do that. Link to comment Share on other sites More sharing options...
MikieM Posted January 20, 2017 Author Share Posted January 20, 2017 I've tried both. Major and Minor. This morning I was using this load: 6.8 grains of WAC, 125 grain PD/JHP, WW once fired, CCI primers, 1.165 AOL. 7 pound recoil spring. 90 degree scope mount. It has run the best with this load. Controllable and accurate. Still, there were three jams out of a full (170mm) magazine. Nose of the bullet stuck under the chamber hood. The mags were all tuned according to Dawson specs, and have Taran internals. Beats the hell out of me. Link to comment Share on other sites More sharing options...
mitchiepinoy Posted January 20, 2017 Share Posted January 20, 2017 6 minutes ago, MikieM said: I've tried both. Major and Minor. This morning I was using this load: 6.8 grains of WAC, 125 grain PD/JHP, WW once fired, CCI primers, 1.165 AOL. 7 pound recoil spring. 90 degree scope mount. It has run the best with this load. Controllable and accurate. Still, there were three jams out of a full (170mm) magazine. Nose of the bullet stuck under the chamber hood. The mags were all tuned according to Dawson specs, and have Taran internals. Beats the hell out of me. Trade that IN to CKARMS... case closed Link to comment Share on other sites More sharing options...
Glk21C Posted January 20, 2017 Share Posted January 20, 2017 Do the 140 mags jam the same way? If yes, I've got nothing. If no, check the extractor tension, probably a little too light good luck Link to comment Share on other sites More sharing options...
MikieM Posted January 20, 2017 Author Share Posted January 20, 2017 3 hours ago, mitchiepinoy said: Trade that IN to CKARMS... case closed Don't temp me. Link to comment Share on other sites More sharing options...
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