earthshine402 Posted July 4, 2014 Share Posted July 4, 2014 (edited) I've got about 1.5k rounds through my new 2011, and I've noticed every time I "unload, show clear", that round has a gouge in the front of it. I load coated lead bullets - 1.180" truncated cone. When I take the mag out, the top bullet is very far forward. I think as the gun is firing, the top rounds are shifting forward, and when one feeds it is very far forward and may be getting jammed against some part of the feed ramp that it should not be. Anyone have any experience with this? Is it the mags? Gun? I think it is effecting my accuracy, as the groups I shot yesterday were not all that great, and I got better accuracy out of my G35 with similar loads, just a little shorter OAL (1.138"). Does this make sense? Can a big gouge like that lower the accuracy? edit:(accuracy problem could be due to shooter error, getting used to new platform)Is my solution to just load jacketed for now? I'd like to figure this out. Edited July 4, 2014 by earthshine402 Link to comment Share on other sites More sharing options...
SJan Posted July 4, 2014 Share Posted July 4, 2014 (edited) When you ULSC, where or how does the ejected round exit the gun? Does it follow the same pattern as spent brass? Does it hang up and drop down the mag well? Sometimes extended ejectors and long loaded ammo cause for difficulty in ejecting a loaded round. The gouge may be on the cleared round, but not on bullets fed and fired. Edited July 4, 2014 by SJan Link to comment Share on other sites More sharing options...
earthshine402 Posted July 4, 2014 Author Share Posted July 4, 2014 its on the fed round, it ejects the same. yesterday, i gingerly ejected and it dribbled out of the gun, it still had the mark. Link to comment Share on other sites More sharing options...
carlosa Posted July 4, 2014 Share Posted July 4, 2014 (edited) Here's what's happening your bullets are not feeding in the proper angle. When the slides pushes the round out of the mag the nose of the bullet is raising and hitting the inside edge of the hood of the barrel. And getting deflected back into the chamber. Your feed ramp angle might need to be adjusted or your magazines might be holding the rounds at a bad angle... Edited July 4, 2014 by carlosa Link to comment Share on other sites More sharing options...
NoSteel Posted July 4, 2014 Share Posted July 4, 2014 With a hit that hard some of your accuracy issues could be due to bullet set back... Not sure how light your crimp is but depending on your load a shortening OAL is going to be a problem...... Link to comment Share on other sites More sharing options...
anilson Posted July 4, 2014 Share Posted July 4, 2014 Last post is most likely correct. What are the distances on your mag feed lips on the top where it holds the bullet. I like the rear at .375 and front at 3.90 This makes the bullets point up a bit. You also need a chamfer on your barrel, I bet you don't Link to comment Share on other sites More sharing options...
earthshine402 Posted July 4, 2014 Author Share Posted July 4, 2014 Last post is most likely correct. What are the distances on your mag feed lips on the top where it holds the bullet. I like the rear at .375 and front at 3.90 This makes the bullets point up a bit. You also need a chamfer on your barrel, I bet you don't organized by basepad color: rear front Black : .3805 .3845 silver: .382 .384 blue : .384 .389 red : .379 .391 took a pic of the barrel.. Link to comment Share on other sites More sharing options...
Sarge Posted July 4, 2014 Share Posted July 4, 2014 (edited) I have the same markings on my 121 IFP's. I have been told it's because they are too long. I have been told they are too short. I have also been told it's perfectly normal as it's caused by the round under the feeding round getting drug into the bottom of the barrel ramp. My gun feeds and runs perfect most generally. But nearly every time I eject a round at ULSC it has the crescent shape on it. Edited July 4, 2014 by Sarge Link to comment Share on other sites More sharing options...
Supermoto Posted July 4, 2014 Share Posted July 4, 2014 (edited) It is the top round in the mag hitting the feedramp edge. The round is moving under recoil. You can round the edge off the feed ramp. Also make sure the disco rail doesn't have a sharp edge, it will drag the top round forward if it does Edited July 4, 2014 by Supermoto Link to comment Share on other sites More sharing options...
v1911 Posted July 4, 2014 Share Posted July 4, 2014 At 1.180 you're probably at the max OAL your mag can handle without taking out the spacer. Have you tried working with a shorter OAL? Looks like you're hitting the bottom of the feed ramp. I've loaded as far out as 1.190 but gained nothing in accuracy as opposed to the shorter 1.50. Link to comment Share on other sites More sharing options...
Ultimo-Hombre Posted July 4, 2014 Share Posted July 4, 2014 It is the top round in the mag hitting the feedramp edge. The round is moving under recoil. You can round the edge off the feed ramp. Also make sure the disco rail doesn't have a sharp edge, it will drag the top round forward if it does This. Match up that cut in your bullet nose with the bottom of the feed ramp. If it matches.... Link to comment Share on other sites More sharing options...
earthshine402 Posted July 4, 2014 Author Share Posted July 4, 2014 It is the top round in the mag hitting the feedramp edge. The round is moving under recoil. You can round the edge off the feed ramp. Also make sure the disco rail doesn't have a sharp edge, it will drag the top round forward if it doesThis. Match up that cut in your bullet nose with the bottom of the feed ramp. If it matches.... I just checked. The gouge is definitely from the feed ramp.I cycled some dummy loads. The top round in the mag is always very far forward upon mag removal. I dont feel any sharp edge on the disco rail. v1911, this is a .40, no spacers. I am going to call my builder next week for a solution, he says there is a solution. Link to comment Share on other sites More sharing options...
TH3180 Posted July 5, 2014 Share Posted July 5, 2014 I have seen that before. Milled down the bottom of my feed ramp, problem solved. http://www.brianenos.com/forums/index.php?showtopic=175497&view=&hl=&fromsearch=1 Link to comment Share on other sites More sharing options...
earthshine402 Posted July 5, 2014 Author Share Posted July 5, 2014 I have seen that before. Milled down the bottom of my feed ramp, problem solved. http://www.brianenos.com/forums/index.php?showtopic=175497&view=&hl=&fromsearch=1 Pic? you never got around to posting one in that thread. Link to comment Share on other sites More sharing options...
TH3180 Posted July 5, 2014 Share Posted July 5, 2014 I have seen that before. Milled down the bottom of my feed ramp, problem solved. http://www.brianenos.com/forums/index.php?showtopic=175497&view=&hl=&fromsearch=1 Pic? you never got around to posting one in that thread.I post when I get home tonight. Link to comment Share on other sites More sharing options...
TH3180 Posted July 6, 2014 Share Posted July 6, 2014 I have seen that before. Milled down the bottom of my feed ramp, problem solved. http://www.brianenos.com/forums/index.php?showtopic=175497&view=&hl=&fromsearch=1 Pic? you never got around to posting one in that thread.I post when I get home tonight. I posted the pix in the thread I linked above. Link to comment Share on other sites More sharing options...
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