Crimp question

el gordo2

Sergeant
Full Member
Minuteman
Jun 13, 2008
993
9
San Antonio, Tejas
Re: Crimp question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pepperbelly</div><div class="ubbcode-body"> I think I know this but want to check and be sure.
I do NOT need to crimp .308 when used in a bolt rifle- correct?

Jim </div></div>


and a hush falls amongst the the audience........YOU ARE CORRECT SIR!
smile.gif
 

Wil

PRE
Full Member
Minuteman
Feb 16, 2006
1,364
4
TX (Austin area)
www.pre-us.com
Re: Crimp question

when you size the case the neck gets squeezed down to a certain diameter...

measure that....

when you seat teh bullet that diameter will change...

measure it...


the difference will tell you your neck tension..

example:

you resize & your neck mics at .333
seat a bullet & it reads .335

that give you a .002 neck tension (what most use)

that is sufficient to keep the bullet from moving around... no crimp necessary...

however some autoloaders (ar10) like a light crimp to ensure teh bullet doesn't slip under recoil in the mag... causing the bullet to push back in teh case & creating a dangerous pressure spike...

not a problem in bolt guns