My scope, after just a little contact (a bump against my back, against my knee when I place it in my lap, etc.) is knocked off zero about two inches at 100 yards. Is this something I just need to learn to live with and be a lot more gentle with my rifle or is this a problem with thescope or mounting? I try to be very gentle with myrifle and think that I am and am surprised that such minor contact results in sucha change in zero. Any help or advice is greatly appreciated.