The Garand/Springfield/Military (Vintage) Competition format was created by the Civilian Marksmanship Program (CMP) to provide a simple, easy to learn, introductory “High Power” style format for newer shooters to get into the sport.
The CMP Rulebook defines two different courses of fire that can be used for GSM matches.
Course A has three stages:
- Slow fire prone, 5 sighters followed by 10 shots for record
- Rapid fire prone, 10 shots for record
- Slow fire standing, 10 shots for record
Course B has four stages:
- Slow fire prone, 5 sighters followed by 20 shots for record
- Rapid fire prone, 10 shots for record
- Rapid fire sitting, 10 shots for record
- Slow fire standing, 10 shots for record
All stages are fired at 200 yards.
Basically any “as-issued” M1 Garand, M1903 or M1903A3 Springfield, or other foreign military bolt-action service rifle can be used in the GSM matches.
“As-issued” means the rifle cannot be modified in any way such that the rifle does not have the same characteristics as it was issued by the military that used it. For example, you cannot put a heavy contour barrel on an M1 Garand for a CMP Garand match. The barrel must have the same contour as the original service rifle barrel. Aftermarket barrels are legal, as long as they have the same contour and length.