I've fallen in love with the PT-22. I just enjoy the heck out of putting rounds through it. BUT, I know it's only spupposed to be used with max bullet performance of 40 gr. @ 1280fps. Would this include the Wally World's cheap federal or winchester's Xpert brand? They both say high velocity not hyper velocity. I've noticed that the slide is slamming the frame near the barrel pivot enough to show some deformation of the frame (yeah know, sorting of dings). Is this expected from std velocity ammo? Thx,wolfz