It actually enhances accuracy. The tape allows extra air pressure to build up ahead of the bullet in the barrel and when the pressure finally breaks the tape, the tape disk is launched staight ahead at high velocity and creates a momentary "flat spot" in the atmospheric meplat (that small cone of air pushed straight ahead by the bullet meplat) which the bullet itself then slips through in a more regulated manner, thereby negating the unevenness inherent in the microsphere at the crown normally induced by the slower expulsion of the air ahead of the bullet.
What he said.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
