Sure looks like a small gun to be pushing a 450 gr. bullet at 2,200 fps. And, 65,000 psi sounds a bit extreme, although that design by JMB is the strongest in class by a good margin. Bet it kicks like a mule...
As a comparison, a .470 NE pushes a 500 gr. slug at 2,150 for 5,000+ ft. #'s of KE. And, those guns usually weigh 9-10 #'s.
DF
