Applying tape with a pistol grip style tape dispenser is quick and accurate. Loading new tape into the tape gun is a matter of putting a fresh roll on the spindle and routing the tape between a guide and a roller to the cutting teeth. With practice, it takes only a few seconds.
Use the right size of tape. Two-inch and three-inch widths are the most common. Your tape gun will accept one or the other, but not both.
Lay the tape dispenser on a stable flat surface and pull the old tape core off the tape wheel.
Pull about six inches of tape from the new roll and fold the last inch over so that the sticky sides adhere to each other. Press the new roll onto the tape wheel as far as it will go with the sticky side of the tape facing down toward the pistol grip of the dispenser.
Route the tape between the guide flap and the roller, then pull it up to the cutting teeth. Cut off excess tape by pulling the slick side of the tape back against the teeth.
Some pistol grip tape dispensers have a brake tension adjustment knob in the centre of the spindle. Adjust the brake tension so that the tape applies with minimal effort and doesn't break from too much tension.