If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
I have the lee factory crimp dies and crimp all my rifle rounds, just out of habit I guess... not saying it is needed but, better safe than sorry IMHO.
I have been testing the difference between crimping and neck tension over the last year. Shooting 4-rd groups at 100yds. .004" of neck tension gives slightly more accurate groups with the added bonus that the extra step of crimping is not needed.
Here are the group sizes. No bullets or groups discounted.
I have the RCBS 264 LBC dies and they do a taper crimp and they do a good job of applying the crimp while seating the bullet saving a step. For the Grendel I do it because of being cycled through a semi auto action is not a tender thing. When I had a 300WM I crimped because the chromo showed more consistent velocities and smaller SD with crimped rounds.
I have been testing the difference between crimping and neck tension over the last year. Shooting 4-rd groups at 100yds. .004" of neck tension gives slightly more accurate groups with the added bonus that the extra step of crimping is not needed.
Here are the group sizes. No bullets or groups discounted.
.004 - That's tight. IIRC Most are running .003, including myself. I was under the impression that one wanted the loosest hold on the bullet possible and still prevent movement when chambering. Bolt gun could probably go .002.
.003 for me in Hornady 1x and 2x stays put in my AR with a JP SCS with a one step heavier spring from their multipack (I really should back off to a lighter one).
Comment