i built a 32 hand r 32 15 years ago was the best tree rat gun i ever owened was stolen with 8 others that 32 and 10 ga was only one i never got back......missed is so bad i built 5 since....seems others like mine so well they end up with them,,,,,,,,,i use 308 dia barrels and heavy lead bullets at sub sonic speeds.....still can hit a tree rat at 70 yards bullets drop fast after that range......lighter bullets good for a lot longer but make more noise....had a 32 20 its deer leagal in okla,,,,,just like the 32 mag better........but still can do same with 322o.....brass is about the same to find........dont know about the 327,,,,,,,have no reamer for it////////jb