The Contender is an accurate little gun... and according to the records shot pretty well. Better than the P-38 I shot at the time. Wish I still had it. WWII bring back..Holster and 2 mags. The 160s were sized at 357 and I remember pushing them into the chamber just slightly. Didn't expand for spit. Shot some factory ammo but no records of it in the book.. I still have 6 or 7 pistol bbls for the Contender including 41 mag 38/357 45 auto 44 mag and a 45 Colt as well as the 9mm. The rest are mostly rifle rounds like the 22H 218 Bee. I tried pushing the 45 auto in the Contender and was surprised how much faster it could be pushed... and never blew a primer. Lead bullets in the high vel loadings would really lead the bore though. I even loaded some 45 auto with 2400...lead bullets. Think I still have a box or so left somewhere. Ok performers in the Contender... not in an auto. Bbl length is 8 inches on the 45