Also to mention first session 15 rounds no problems. second session 50 rounds of federal bought at local gun store. It was federal 110 grain. The box was old and the rounds were tarneshed beyond normal. Some of the metal on the jackets was worn away to lead! This was the ammo I was shooting when this isue started.
Sounds like some poor quality reloads. Good idea about cleaning the bolt, it can't hurt, but try some factory fresh ammo the next time and I believe your problem will disappear.