A very knowledgeable club member (a retired commando and Afghanistan veteran) gave me the feedback that I keep shifting my grip after making each shot, and thus changing my point of aim. The problem is that I don't recall doing this deliberately, so it must be something unconscious that's being observed.
Is this a common issue, and how can it be addressed to correct my technique? I'm taking a wild stab that many of the club handguns have relatively smooth grips, so something with more texture might help.