My buddy has offered to build (cnc) me an adapter so I can shoot Toks out of my old Rem P-17 30-06.My first question is --Will the 1.125 inches of extra freebore from the adapter possibly damage my rifling when the 86 gr bullet slams into it and what would you guys think would be the best metal to make the adapter out off??? I've liked the 7.62 x 25mm cartridge since I bought a Tokerev pistol over 20 years ago and would like to be able shoot that cartridge through a rifle.I know a shorter barrel than my P-17 would be better speed-wise, but I'm not ready to risk using my Browning until I'm sure I would not be damaging the rifling.Has anybody on GN's got that type of adapter and if so ,how do they work?