Problem exists in the shooters hand only. The story... A buddy owns a RIA 45acp M1911-A1FS. He has a strong side hand injury. He shoots one round, sometimes 2, and the gun ejects the empty case but doesn't strip another round & go into battery (failure to feed). Similar to, locks back on empty mag. Myself and another experienced shooter confirmed the pistol shoots ok...just not for the owner! I believe his grip is insufficient to actuate the grip safety, after recoil, due to stated injury. I've tried a more reinforced weak side hand position, that didn't help yet. We didn't try him firing from weak side only. Is this a common 1911 45 issue and/or is there anything to be done such as, different grip panels...some type of spacer device on outside of grip safety, etc.? thanks!