Hello. i am loading for a pva 6 dasher. I am trying to figure the oal to the lands. the method i am using to find this measurement is i took a case and put 3 slits in the neck. enough tension to hand seat the bullet, but once chambered, it is difficult to remove the bullet, so i am assuming the bullet was pushed back to the oal of the lands. i am then using the hornady comparator to measure to the ogive. i have tried 2 different bullets (105 hybrid and 75 vmax) and get 2 different results to the lands. Each bullet i did 4 measurements and there were slight variations each time.
my questions are:
1. with the variations, is this an accurate measurement? ie when measureing oal with your favorite method, is it the same everytime?
2. is it not odd to get 2 different measurements using different bullets? since i am measuring off the ogive, i would assume this measurement should be the same for any bullet?
a. if i seat the 75 gr vmax to the measurement i get for the 105 hybrid, the bolt is very stiff to close.
3. would you trust these avg's looking at the measurements below?
105 hybrid
1.7965
1.7910
1.7955
1.7930
AVG 1.794
75 vmax
1.7510
1.7460
1.7470
1.7470
AVG 1.7475
my questions are:
1. with the variations, is this an accurate measurement? ie when measureing oal with your favorite method, is it the same everytime?
2. is it not odd to get 2 different measurements using different bullets? since i am measuring off the ogive, i would assume this measurement should be the same for any bullet?
a. if i seat the 75 gr vmax to the measurement i get for the 105 hybrid, the bolt is very stiff to close.
3. would you trust these avg's looking at the measurements below?
105 hybrid
1.7965
1.7910
1.7955
1.7930
AVG 1.794
75 vmax
1.7510
1.7460
1.7470
1.7470
AVG 1.7475