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Old February 16, 2013, 11:47 AM   #19
Join Date: March 4, 2005
Location: Ohio
Posts: 13,715
Measure the length of the bullets. Then apply Magic Marker around one and set and lock the jaws of your caliper at 0.001" less than the bullet's diameter as measured on your caliper. Gently set the jaws over the nose of the bullet to see where they scuff the ink. Measure the distance from the bullet base to that mark on both sides and take the average. That's the length of the bearing surface.

Subtract that bearing surface length from the bullet length to get the length of the ogive and tip. Add that to 0.92" to get an estimated COL. Add 0.898" (max case length) plus the average bullet length, then subtract that COL. This is the seating depth. Tell me that last result and the bullet length.
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