No, take one piece of brass and full length size it, then cut the neck so that a bullet can be slipped in and move in and out by hand. Seat the bullet long, for my .260 I may seat it say 2.900", ease it into the chamber, close the bolt, and then ease the bolt open and the round out. Measure that with your OAL gauge and write it down, let's say 2.825". Pull the bullet long again, this will be easy to do with just your fingers, and repeat 9 more times. That that average and that is your distance to the lands.