This is suppose to be in the GGG Link but I don’t think Rick/Robin (MD’s) have out there yet:
Divisions
Open Division:
Open Division rifles will not exceed a caliber of .30 or a velocity of 3,200 fps. A match DQ will result any rounds over the speed limit of 3,200 fps (+/- 32 fps for environmental factors and equipment discrepancies).
Match Officials may request at any point during a match that a competitor fire their rifle through chronograph. If the bullet exceeds the 3,200 fps speed limit, the shooter will receive an automatic match DQ.
Tactical Light Division:
Intended to allow competitors the opportunity to compete using traditional military and law enforcement caliber. This promotes Active Duty military and law enforcement competitors use of their Service and Department issued rifles.
Tactical Light Division rifles are restricted to 5.56 NATO/.223 Remington calibers only.
Bullet weight cannot exceed 77 grains and muzzle velocity cannot exceed 3,000 fps.
Tactical Heavy Division:
Intended to allow competitors the opportunity to compete using traditional military and law enforcement caliber. This promotes Active Duty military and law enforcement competitors use of their Service and Department issued rifles.
Tactical Heavy Division rifles are restricted to 7.62 NATO/.308 Winchester calibers only.
Bullet weight cannot exceed 178 grains and muzzle velocity cannot exceed 2,800 fps.
No modified wildcat rounds permitted to shoot in the Tactical Divisions Anyone discovered violating this rule will receive an automatic Match DQ.
Tactical Division shooters will shoot the exact same COF as Open Division