I am gonna be using Shockwaves and XTP's in my 50's but nothing but prb's for my 54. Too many good reviews of prb's and their hostory is too good to listen to drivel like that. It was mentioned that if an arrow will blow thru a deer at 30 yards that somebody would have to have rocks in their head to think a prb wouldnt do the same. Its all about the sales....the game are not getting any tougher...the same things that worked back then will work now. Lots of people woulda starved without them roundballs.