I participated in IMSHA back in the late 70s. It was all handgun matches at chicken, pig, turkey and ram targets. At one match I won first place in Production Class using a Ruger Super Blackhawk 44 mag. I used max handloads. At another match I won 3rd place in Production Class using a Ruger Blackhawk in 41 mag. These match took place in S.E. Iowa in an abanded rock quarry. Contestants came from all over Iowa for the State Champion shoots. It was much fun!