[QUOTE=Karl.Luhr;41601]I don't know if anyone else on the board does this but I always place a piece of electrical tape over the muzzle of my rifle. I shoot right through the tape. I know the Marine snipers also do this and figure it works for them. I too carry some tape so after I shoot and prior to heading back out I can again cover the muzzle with tape prior to dragging the deer out. I haven't checked it but it may effect the shot slightly. Not having to ever worry about something getting into the barrel is worth it.
I do this all the time in bad weather. You can buy little condom-type muzzle covers for this. Never checked how they effect bullet flight at the range, but killed every deer or elk I ever used them on. (Although it's a little hard getting a condom on a deer or elk!)