U.S.SFC_RET
Ultimate Member
- Dec 8, 2005
- 6,833
Midwayusa.com sells a digital vernier caliper pretty cheap. Accurate to boot. Consider it a draw item if you will. Like milk at Royal Farms. Have a go at it with the digital type. It's strongest point is you can reset to zero at any point, that means if you want to reload very close to the lands you can do it with a bullet comparitor attached to the digital vernier caliper.
1. Take your cartridge and slice one side along the neck.
2. Insert bullet partway down.
3. Use a Bic lighter and smoke the bullet where the rifle lands will meet.
4. Chamber bullet and extract bullet.
5. Verify lands touching because of the smoke left on bullet.
6. With attached bullet comparitor, closed and zeroed, open the caliper and mike the bullet.
You are actually finding out where the lands are touching the bullet in the chamber.
Now if you want to chase that ever elusive accuracy you always wanted set your bullet seating die at a very comfortable distance of 20 thousands of an inch!
And you always thought a vernier caliper was just to measure cartridge length and guard against STRETCHING.
1. Take your cartridge and slice one side along the neck.
2. Insert bullet partway down.
3. Use a Bic lighter and smoke the bullet where the rifle lands will meet.
4. Chamber bullet and extract bullet.
5. Verify lands touching because of the smoke left on bullet.
6. With attached bullet comparitor, closed and zeroed, open the caliper and mike the bullet.
You are actually finding out where the lands are touching the bullet in the chamber.
Now if you want to chase that ever elusive accuracy you always wanted set your bullet seating die at a very comfortable distance of 20 thousands of an inch!
And you always thought a vernier caliper was just to measure cartridge length and guard against STRETCHING.
