kortik sure is a big talker....reminds me of when i first joined....that was when i couldnt go 5min without losing the feeling in the ends of my fingers.

OP should try some "other ammo?!?" to see if it shoots correctly. Also, from what i've read, they laquered ammo to seal it, not for lubrication, so the thought of it being laquered MG ammo, isn't really plausible, unless someone was high that day. Only other thing it could be is if the necks weren't trimmed enuff, or if there's an unseen burr in part of barrel where neck seats.