The .300 was running Barnes Vor-Tx ammo with a full configuration Rugged Radiant, full mass BCG, Griffin SOB, and Law Tactical folding adapter so and addition 2 oz. of buffering mass with the plug, and a Tubb lightweight flatwire. Issue wasn’t the set up or the can. Or that it was still air where I was shooting (Bc I had just shot the 5.56 with said MEN ammo and the can in K configuration with no gas to the face), the issue is the Fortis charging handle on the .300, which is pretty open throughout the latching mechanism and gives the gas a straight shot to your face. Pretty confident a raptor will fix things up, but that’s on hold until after the holidays.