Typetwelve, I agree about the moon clips, but most shooters do not seem to share our opinion. FWIW, 9MM +P, or even +P+, chronographed in these short 2"-3" barreled revolvers approximates velocities in 4"-5" semi-autos. So, for better or worse, I would expect effectiveness to be the same. Someone will probably be along soon to school me for about the 343rd. time that cylinder length should be included when comparing revolver vs. semi-auto velocities. I'm aware, and don't care, since I'm only reporting results, not trying to convince anybody of anything
For instance, the Federal 9MM 124 HST +P averages 1195 FPS in my 2" revolver, and 1291 FPS in a 3" revolver. The Federal "9BPLE" 115 grain +P+ averaged 1213 FPS in the same 2" revolver, 1313 FPS in the 3". So, counter intuitive as it might seem, the 9MM revolvers don't lose much ballistically as compared to semi-autos of similar, or even longer barrel length. I realize other's results might vary, since no two manufactured items, like guns, are exactly the same.....