Shooter17 Posted April 18, 2020 Share Posted April 18, 2020 I just purchased 4 140 mm Teflon STI mags and they won’t feed in my 2011 Costa Ludus. The round is catching the feed ramp. What are the recommendations to rectify this problem? Also, has anyone had any issues with MBX mags and this gun? I might return these mags and grab MBX instead. Thank you, Link to comment Share on other sites More sharing options...
BLUEPSTU Posted April 18, 2020 Share Posted April 18, 2020 Is this happening with full magazines only or does it also happen with downloaded magazines? Link to comment Share on other sites More sharing options...
forty5cal1911 Posted April 18, 2020 Share Posted April 18, 2020 (edited) I’m having the same issue with MBX gen 1 140 mm mags when full. If I only load 1 round or a few rounds it won’t hang on the feed ramp. OAL doesn’t seem to matter as I’ve loaded them down to 1.125 and same problem. Edited April 18, 2020 by forty5cal1911 Link to comment Share on other sites More sharing options...
Shooter17 Posted April 18, 2020 Author Share Posted April 18, 2020 2 hours ago, BLUEPSTU said: Is this happening with full magazines only or does it also happen with downloaded magazines? Full magazine. I haven’t tried to shoot with them yet. Link to comment Share on other sites More sharing options...
Shooter17 Posted April 18, 2020 Author Share Posted April 18, 2020 21 minutes ago, forty5cal1911 said: I’m having the same issue with MBX gen 1 140 mm mags when full. If I only load 1 round or a few rounds it won’t hang on the feed ramp. OAL doesn’t seem to matter as I’ve loaded them down to 1.125 and same problem. Well that sucks! Link to comment Share on other sites More sharing options...
forty5cal1911 Posted April 18, 2020 Share Posted April 18, 2020 2 minutes ago, Shooter17 said: Well that sucks! Yeah no doubt! I've got a MBX gen 2 that should be in tuesday and we'll see how it runs but would really love to be able to fix my gen 1's. Link to comment Share on other sites More sharing options...
forty5cal1911 Posted April 19, 2020 Share Posted April 19, 2020 I've found that the feed lips on these Gen 1 MBX .40 cal mags were Front .385 and Rear .390. I've opened up the front to be .397 and is definitely much better when hand feeding with no recoil system. Will see if it can run a full mag without a failure to feed today. One thing I've learned on these 2011 platforms is that EVERYTHING requires tuning, no exceptions.... YMMV Link to comment Share on other sites More sharing options...
RangerTrace Posted April 19, 2020 Share Posted April 19, 2020 19 hours ago, Shooter17 said: I just purchased 4 140 mm Teflon STI mags and they won’t feed in my 2011 Costa Ludus. The round is catching the feed ramp. What are the recommendations to rectify this problem? Also, has anyone had any issues with MBX mags and this gun? I might return these mags and grab MBX instead. Thank you, What kind of bullet are you trying to load? If it's a JHP or flat nosed bullet, I would suggest trying a stronger magazine spring. That has solved all of my feeding issues with stock STI mags. Link to comment Share on other sites More sharing options...
Postal Bob Posted April 19, 2020 Share Posted April 19, 2020 (edited) The feed lips probably need to be adjusted(widened), particularly the front ones. They're not allowing the round to tilt upwards when feeding, and ride up the ramp, because they are to tight. Edited April 19, 2020 by Postal Bob Link to comment Share on other sites More sharing options...
BLUEPSTU Posted April 19, 2020 Share Posted April 19, 2020 23 hours ago, Shooter17 said: Full magazine. I haven’t tried to shoot with them yet. That was my guess. I would try to download and after you have used the magazines a good bit, see if it works with a fully loaded mag. Link to comment Share on other sites More sharing options...
Shooter17 Posted April 20, 2020 Author Share Posted April 20, 2020 10 hours ago, RangerTrace said: What kind of bullet are you trying to load? If it's a JHP or flat nosed bullet, I would suggest trying a stronger magazine spring. That has solved all of my feeding issues with stock STI mags. I tried using JHP’s first. Switched to Fmj and those are feeding well. Link to comment Share on other sites More sharing options...
Shooter17 Posted April 20, 2020 Author Share Posted April 20, 2020 10 hours ago, Postal Bob said: The feed lips probably need to be adjusted(widened), particularly the front ones. They're not allowing the round to tilt upwards when feeding, and ride up the ramp, because they are to tight. Okay I will try and separate them a little. Link to comment Share on other sites More sharing options...
Shooter17 Posted April 20, 2020 Author Share Posted April 20, 2020 2 hours ago, BLUEPSTU said: That was my guess. I would try to download and after you have used the magazines a good bit, see if it works with a fully loaded mag. Very well appreciate the guidance! Link to comment Share on other sites More sharing options...
RangerTrace Posted April 20, 2020 Share Posted April 20, 2020 11 hours ago, Shooter17 said: I tried using JHP’s first. Switched to Fmj and those are feeding well. That would fit the same issues I had that were resolved with 11 coil ISMI springs. Link to comment Share on other sites More sharing options...
Postal Bob Posted April 20, 2020 Share Posted April 20, 2020 (edited) 16 hours ago, Shooter17 said: I tried using JHP’s first. Switched to Fmj and those are feeding well. First, is your OAL somewhere between 1.180"-1.20". 2011 guns work best with rounds loaded long. Next a good properly tuned 2011, and tuned mags, should feed anything. All my 2011's will feed equally well JHP's, FP's, and FMJ's. If the JHP's are hitting the bottom of the feed ramp, and hanging up, it means they are pointing too low when being stripped out of the magazine. Besides a magazine catch or extractor issue, it's usually a magazine feed lip issue. When a round is fed from the magazine, it should make contact with the feed ramp somewhere in the middle of the ramp. Too high, or too low, it will hang up. This video by Atlas guns explains it best, and how to fix it. Edited April 20, 2020 by Postal Bob Link to comment Share on other sites More sharing options...
BLUEPSTU Posted April 20, 2020 Share Posted April 20, 2020 18 hours ago, Shooter17 said: Very well appreciate the guidance! Yes sir. That is the easiest thing to try first. Please let us know how it goes. Link to comment Share on other sites More sharing options...
forty5cal1911 Posted April 20, 2020 Share Posted April 20, 2020 2 hours ago, Postal Bob said: First, is your OAL somewhere between 1.180"-1.20". 2011 guns work best with rounds loaded long. Next a good properly tuned 2011, and tuned mags, should feed anything. All my 2011's will feed equally well JHP's, FP's, and FMJ's. If the JHP's are hitting the bottom of the feed ramp, and hanging up, it means they are pointing too low when being stripped out of the magazine. Besides a magazine catch or extractor issue, it's usually a magazine feed lip issue. When a round is fed from the magazine, it should make contact with the feed ramp somewhere in the middle of the ramp. Too high, or too low, it will hang up. This video by Atlas guns explains it best, and how to fix it. +1 on this I load to 1.19 in .40 and had to open my front mag lips up so that the round presents the projectile tip higher and strikes the feed ramp in the proper position. I confirmed 100% running with my MBX mags yesterday after that modification. You can use a black sharpie to color the feed ramp to determine where your rounds are hitting. Link to comment Share on other sites More sharing options...
Shooter17 Posted April 22, 2020 Author Share Posted April 22, 2020 Badass! That video was fantastic! Thank you! Link to comment Share on other sites More sharing options...
Postal Bob Posted April 23, 2020 Share Posted April 23, 2020 Your welcome. Hope it works out. Link to comment Share on other sites More sharing options...
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