The only time I do not clean my weapons after firing them is right before I hunt in extremely cold temperatures. My weapons are all sighted in and remain that way and should if you purchase a quality scope so I don/t have to "sight in" every year. I do shoot often however and clean my weapon every time. If I am going to hunt extremely cold weather I fire 2 shots out of a clean and "lightly" oiled weapon. I then run a patch down the barrel and wipe any excess oil off from the action and every wear else mechanical movement occurs.