2 things. Smack the back of the loaded mag on your helmet....I mean, a table or something.So it looks like the bullet before I push the bolt forward is oriented slightly nose down. When I manually push the bolt forward it locks into proper position. This seems to happen with all 3 mags (2x 10 and the 20 round redball)
With the redball after I load the magainze and pull back on the bolt it gets stuck, but if I pull down on the magazine the bolt clicks back into place
And the biggest thing....go shoot it. There's NOTHING to be solved, until you've shot a few mags full and seen what's really going on.