So too start off, my 66 carbine is stock. No mods nothing. However any factory ammo I've been running lately seems too only feed sometimes. Now it's annoying, kkow tht any factory rounds I used before used to feed flawlessly. I did notice the next cartridge in the magazine juts out the tiniest amount, just enough to stop feeding. But this happens sometimes. It's a 50/50 deal and it seems weird to me that it does this now but not before. Any thoughts?