The little P10 has an integral ramp and the chambers are over throated so they can feed hollow points. I carried one for about a year, in that time I had 2 barrels replaced by P.O. after Corbon and Hydroshock cartridges blew out. It seems thay got so carried away with the "throating" that a good 1/3 of the case is unsupported on the bottom. They told me flat out they don't intend to alter the barrel design, so I pawned it off on the first patsy I could find. I got tired of picking brass out of my face and hands!