Originally Posted by
7MMXBOLT
By crimping, the pressure most likely did increase but the velocity most likely dropped effecting the trajectory therefore changing the POI. No reason you should have to crimp in this caliber, just make sure your sizing the case properly.
pawildman has given you two good ways to measure however I wouldn't start moving the bullet around until you settle on a load that you are satisfied with and then adjust your seating depth to tighten up the group...if it will help. But knowing where your at now will help you determine how much your moving the bullet later.
Originally Posted by
Pawildman
Good advice... I just wanted to be sure he knew where he was with the bullet/lands thing off the bat. Tweaking seating depth is best left, as you said, after a noticeably good grouping occurs and repeats itself with a particular bullet/primer/powder load.....
Thanks, Guys. Since I have almost a full pound left of Varget, I will concentrate on the 55 grain rounds with no crimp. After the Varget is gone I will get the IMR as recommended by several of you and the Barnes rep. I SHOULD be able to neck size only as the cases are fireformed, but that didn't work the first time around. I'll have to wait and see. Thanks very much for the tips and safety lessons.
Just a point of interest, I didn't measure the cartridge lengths, but I have 2 boxes of factory ammo, and my reloads. My 120 gr reloads are slightly longer than the factory Win 125 SP, and the factory Rem Core-Lokt 150s are significantly longer then both of them. If length is important, why are lengths different out of the box? One size doesn't fit all??