I am going through a debilitating round of Adhesive Capsulitis in my right shoulder. I can't use that arm to lift a handgun upward out of a belt holster, no matter the position. I can't reach across my body to access a handgun from a cross draw holster. All I can use is a front left pocket holster for a J Frame or a small semi auto. Not ideal by any stretch, but it is what it is.
