I do it depending on where I am hunting and weather conditions. As noted above, it doesn't change the point of impact. I have tested this with so many rifles that I don't bother to check anymore.

I keep a roll of electrical tape in my day packs and fanny packs just to safeguard my barrels and to attach the carcass tag to a kill. I actually prefer "penny balloons" for the muzzle, but never see them for sale anymore...

Ben

Some days it takes most of the day for me to do practically nothing...