AR double feed continues...

by rob , Friday, July 03, 2015, 19:32 (3435 days ago)

Thought I'd make a quick dash to the range again today. I fired five rounds of my handload w Barnes 55TSX/27.0 CFE223. No failures. Then I fired five of my original handload that has given me no failures of any kind, ever. It started double feeding immediately. Thought it might be my Caldwell brass catcher so removed it...didn't help. Tried five Hornady 55SP factory load with no problems. Shot a few more of the original handload (2nd group above) and went back to double feeding. That load has been nothing but reliable and extremely accurate (as it was today...5 rounds about 3/4" 100 yards). I'm now convinced this isn't a pressure problem. Cleaning the gun now but chamber looks fine, see nothing wrong with BCG and extractor is tight enough I can't budge it by hand. Other than one round that stayed in the chamber last time out when feeding them single I'm suspecting magazine. This particular mag is a Magpul but until yesterday at the range has never given any troubles. Also, yesterday was only the second time I've had it to the range with this lower receiver I built. Other than the fact that it holds the mag I can't see how it could be affecting this. It has an AR Stoner mil spec buffer tube and spring. I can try another mag ( next time out will no matter what just to rule it out) but wondering what else I might look for. Thanks,

rob