Taping muzzles has been pretty much standard practice for NZhunting for at least 60 years. It makes no difference to accuracy (tape is usually blown off by air pressure ahead of the bullet) and it keeps water, snow, mud, etc. out of the bore. We don't bother with the secondary retaining wrap and use about 2" of plastic insulation tape with about a 3/8" overlap which blows free easily. After shooting just peel off and repeat. I have had to trim bulges from many muzzles over the years from new or careless hunters who don't follow the practice.