Discussion in 'Rifle Country' started by beagler, May 3, 2021.
I am able to move the spring on all the mags. The followers do move fully upward as well. I know there are several tricks others are doing with their mags for the 350. There seems to be a common occurrence with jamming and the 350.
BCA was very fast and responsive to my concerns and appeared to fix the issues. They handled all the shipping to and from them for free. Total warranty process took 2 weeks from the initial email to them to today. Bravo BCA!
13 rounds down the tube. Thousands more to follow.
Yes it was the original lower.
Cool. Despite it making very little sense, it seems like it worked. I wonder if they did a little more than they said (like checked and fixed the gas block or port).
Right? I’m confused as well. Oh well, it seems to function now.
This is the reason why I get my new hunting rifles ready well before deer season. I want all the bugs worked out well before opening day. I’m not even mounting a scope on it yet. I’ll run it through it’s paces with flip up sights for now.
I wanted to keep this going for anyone following. I shot 22 rounds today with one failure to feed. So that is one failure in the last 35 rounds. I really like this caliber and my new AR. Hopefully I’ll get more range time soon.
Ran 20 rounds of WW 145 through it today to sight in a new scope. No issues except the bolt did not lock back on one empty mag. I’m just happy it’s feeding and ejecting well now. 55 rounds down the pipe since BCA sent the upper back to me. It shot well at 50 yards. We will keep shooting it.
When you have a bum Mag it’s easy to either work on that one or replace it .
After examining brass, I began with the feed lips which were leaving striations. Disassembled the magazines and gently sanded with 320 grit until the feed lips no longer resembled razor blades to the touch.
Still had feed issues. Rounds were jamming during cycling. I removed my magazine and began stripping cartridges by hand, noting that often the case mouth would contact the front of the magazine. I whittled at the front of the magazine until I had 100% reliable feed both by hand and with the rifle.
Above showing modified magazine (with round pushed forward to show relation).
As received factory magazines.
Side by side.
I am not an expert in all things AR; I have shot several for a decade or more and assembled a few. I do whole heartedly agree that feed ramps can in no way interfere with lock back. Not ever. If all that’s been done to your rifle was a polishing of the ramps, your hold open isn’t fixed.
I would hunt down a second manufacturer’s magazine to test. I would also weigh the buffer just for fun and find out what others are using. Lastly, though first in actual order, would be to make sure the rifle is correctly lubricated. I got so wrapped up in a pistol build once that I neglected to oil anything. Fired 2 rounds, had to mortar both out, then my brain finally came through for me.
Best of luck.
Thank you! I will check my Dura Mag out and see if I have similar issue as you did. I appreciate the detailed response.
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