Crimp or not.

[maximini14 223]

Have an SFAR308 and handload for it.
What's the consensus on crimping the case on the shank of the bullet and its effect on accuracy in the AR

 

[ARlife4me]

Most will say, NO. For me, it's my preference to crimp. If full or burst fire it would be a definite YES. Also a cheap way to increase pressure to save powder.

 

[Critter Picker]

Is it a necessity? No! But it probably won't hurt use a Lee Factory crimp die. They don't hurt your accuracy, and in some cases actually improve it.

 

[wasskeet]

If you want to delve into the LRH "Crimp" box, here's a link:

Why I Crimp

I know this is going to start the age old battle of crimp or not to crimp and that's not what I'm trying to do so I'm stating "This is why I crimp", This is my opinion so take it for that, I'm just sharing my personal experience and what works for me I am not a competition shooter nor do I...

www.longrangehunting.com

 

[ncwg2boatguy]

On gas guns i use Lee FCD for light crimp. Just insurance from battering bcg heaving bullet into chamber, works well for me. Still very good SD/ES but not with bolt guns.

 

[AussieWriter]

Have an SFAR308 and handload for it.
What's the consensus on crimping the case on the shank of the bullet and its effect on accuracy in the AR

Not necessary. I never even crimped my .460 Weatherby and few men ever shot more of those rounds. If the dies are a good fit and some are not, it won't be necessary.

Crimping when necessary is better suited to straight walled cases to eliminate the case rim catching up during feeding and even that is not common.

If the dies are good, the excuse for holding a bullet secure during recoil whilst in the magazine is a phony argument.

 

[Pointman]

On gas guns i use Lee FCD for light crimp. Just insurance from battering bcg heaving bullet into chamber, works well for me. Still very good SD/ES but not with bolt guns.

I do not crimp rifle bullets unless the projectile has a crimp groove. My only "gas gun" is a S&W M&P AR10—just my preference. So far, I haven't seen any reason to reconsider my opinion, but like I said, it's only my opinion, and that's about as worthwhile as a politician.