D Davey in NM Inactive Aug 12, 2000 #1 Does anyone know the rate of twists for the Ruger PC9 (9mm) and/or the Ruger PC4 (.40S&W) carbines?
M Medic New member Aug 14, 2000 #2 The twist for the PC9 should be 1 in 10 and the twist for the PC4 should be 1 in 16.
