I got a good deal on the 20 gauge Chiappa 8" riffled inserts, for 38sp/357, 45colt, 9mm, and 45acp. I been using my Stevens 301 20ga with these, shot a bunch of 357 and 45 colt out of it. Surprisingly accurate and fun to shoot with these inserts. I am looking forward to whenever Midland Arms starts putting out their centerfire barrels. Then I'll buy one of their 12 ga 18" backpack single shots and pick up a centerfire barrel, hopefully in something like 243 or 30-30.