Taping muzzles actually has it roots way back in the military, and in a lot of rugged areas today, people who spend lots of time in the woods, guides, etc, routinely tape muzzles heavily...mainly to avoid accidently plugging the muzzle with mud, snow, etc without realizing it.
The compressed air preceeding the projectile bursts the tape befiore the projectile gets there...I've test fired shots at the range and saw no change in accuracy at all