frogman68
товарищ плачевная
- Apr 7, 2013
- 8,774
Been going over the first batch of 300 blackout I made and shot just can't see it
All were Hornady 150 grain using IMR 4227 will list each grain used . No changes to the bullet setting die but each group had a different COAL . Looking at it even if the casing were different lengths the only thing that should change is the depth the bullet sits in the case. To eliminate the case I found 5 exactly the same 1.634 , measured them multiple times to be sure , measured the bullets to be sure they are the same. I unscrewed the bullet setting part , set the die to touch plus a quarter turn . I did a bunch of cycles then took a piece of factory ammo and measured it 2.084 so I put that in the press brought it up then screwed the bullet setting part down till it hit then released the ram checked the factory ammo still 2.084. Next I took one of the five and put a bullet in it then measured it . My thinking is it should be a little longer than the factory but this was just a test. Check this dummy round 2.080 yes only .004 different but why wasn't either exact or longer I didn't put the bullet setting part tight just snug ? Thinking I will test another 2.077 I quit . Trying to think of why and cannot see it. Why would it change if the die is secured ? Last weeks numbers were more severe
16 grains 2.115 coal
16.1 grains 2.120 coal
16.2 grains 2.140 coal
16.3 grains 2.138 coal
16.4 grains 2.138 coal
16.5 grains 2.125 coal
Or am i making something out of nothing ?
All were Hornady 150 grain using IMR 4227 will list each grain used . No changes to the bullet setting die but each group had a different COAL . Looking at it even if the casing were different lengths the only thing that should change is the depth the bullet sits in the case. To eliminate the case I found 5 exactly the same 1.634 , measured them multiple times to be sure , measured the bullets to be sure they are the same. I unscrewed the bullet setting part , set the die to touch plus a quarter turn . I did a bunch of cycles then took a piece of factory ammo and measured it 2.084 so I put that in the press brought it up then screwed the bullet setting part down till it hit then released the ram checked the factory ammo still 2.084. Next I took one of the five and put a bullet in it then measured it . My thinking is it should be a little longer than the factory but this was just a test. Check this dummy round 2.080 yes only .004 different but why wasn't either exact or longer I didn't put the bullet setting part tight just snug ? Thinking I will test another 2.077 I quit . Trying to think of why and cannot see it. Why would it change if the die is secured ? Last weeks numbers were more severe
16 grains 2.115 coal
16.1 grains 2.120 coal
16.2 grains 2.140 coal
16.3 grains 2.138 coal
16.4 grains 2.138 coal
16.5 grains 2.125 coal
Or am i making something out of nothing ?