ICORE was founded in 1991 by Mike and Sharon Higashi, long time active shooters in all the handgun sports. Envisioned as an alternative to the "arms race" that was occurring in the other action shooting sports at that time, a revolver-only competition would allow even the most basic equipment to be used and still provide enjoyment and satisfaction. Our sport combines elements of the Bianchi Cup, IPSC, and the Steel Challenge into demanding competition exclusively for revolvers. Our standard paper target is the NRA D-1 target with 4 scoring areas.  Scoring is based on time, including time added or subtracted per the scoring rules.  Falling and stationary steel plates are also used in ICORE events.