Are many Double Action revolvers designed to hold to a point of aim left of centre realizing that most folks are right handed and a heavier trigger pull will cause a shift to the right? I fired a 1908 shipped Triple Lock earlier today and my group was left of centre firing single action and dead on firing double action. Amazingly the group was tighter firing double action vs single action. That's unusual for me. Again my perceptions are unscientific and I may or may not reproduce the same results in future.