Canuck223 said:AFAIK, IPSC no longer allows any round to score major in standard or modified unless the bullet is .400 or greater. Do you really want to shoot a six-gun in Open???
BEARMAN said:Check the IPSC rules appendex D5 . For STANDARD REVOLVER DIVISION there is no minimum caliber for major , just a minimum caliber of .355 to play, so 9mm is as small as you can go. Mind you very few mods can be done to the gun. Goto www.ipsc-canada.org look up rules appendex D5