Im not a PRB shooter but the faster twist 54cals can do some wonderful things with the 54x50 sabots, big conicals and even a few loads with 54x45 sabots. I have basically no interest anymore in a 50cal unless its smokeless capable and light enough to carry all day.

If i was a PRB shooter, the 54cal would still be at the top of my list with the 58cal close behind it. I should have bought one of the GMB 32cal DISC based Squirrel rifles when i had a chance to buy one cheap. That would have been a nice blend of new and old, plus super cheap to shoot.