Yes, the Maxi were propelled by Blackhorn; perhaps you are on to something here. The Federal bullet loads easier than XTP, or Deep Curl do in a crush rib sabot. The Maxi loads easier than the Federal bullet. When the first bullet missed the paper, i assumed it was because of the QLA. However it greatly puzzled me when 3 of the shots hit in the center; i couldn't see how this could happen if the QLA was the issue. If inconsistent ignition is the problem, it kinda all makes a little sense. There certainly wasn't a tight seal with the maxi; the Federal has the scientific chingadero to achieve a seal, and it seemed to work good every shot.