You are most certainly correct. The big man himself even touts the BBA as the only really practical system for playing. I was getting 40-45 good shots indoors, at 250 fps, but it was very cold inside and I was shooting quite fast. I am expecting to see the same 4 tubes and change outdoors. I also took the gun horribly out of tune in order to get it to shoot under 250 fps. I am going to play with springs to get the best efficiency at that velocity (I am playing indoors for the next 3 months at least).
EDIT: It also sips
air. I was eliminated a few times because I was in a gun battle and I took a few full velocity shots followed by... the hammer tripping and there being NO air left whatsoever.