I am going back to the range today. This is what I will do in order to eliminate questions.
1- Use 3 different mags
2- Use 3 different types of ammo ( all different manufactures )
3- Break down the rifle before I go and clean all components. I use CLP on all my guns.
The picture in the OP is what happened when I loaded one round in the mag and then slowly pulled the charging handle back to chamber it. The tip of the round caught the edge and stopped the BCG, resting on the back of the casing.
I will report what happens when I get back. Thanks for all the input from members!!
are you riding the bolt forward? never do that. pull the charging handle all the way back and release. let it slam forward to chamber a round under its own power.