If your going to shoot Powerbelts then go for it but take the time to work up the right charge for that bullet,low and slow seems to be the order of the day with PB's,however, MountainDevil54 has some custom PB's you should try.
I have killed a couple deer with the 245 AT in 50 cal,the first I pushed to hard @ 100 grn (2 50g pyro pellets)
The bullet fragmented but I recovered the deer in sight.
The second was shot was with 80 grn (1/50 & 1/30 grn pellet)
This was a boom flop with a good mushroom on the bullet.
I would hunt with them again,no problem.