Should I crimp

[Wildfire1550]

Picked up a couple semis in 6.5 CR and .308, should I crimp for the semis? Thanks

 

[xsn10s]

Picked up a couple semis in 6.5 CR and .308, should I crimp for the semis? Thanks

I haven't had to crimp with my FAL, M1A, AR10, or AR15. That said you'll have to test your ammo and bullet selection in order to determine if a crimp is needed or not. Mine were 308 Win and 5.56 so I have no working knowledge with 6.5 CM. I do keep a Lee Factory Crimp on hand just in case.

 

[NHPiper]

When I stopped crimping on my 5.56 Mk262 copy loads and my 6.5CM loads, I gained probably 1/4 MOA in accuracy. My answer is no.

 

[BLEE]

I don't and don't have issues. YMMV

 

[Fig]

You shouldn't need to. I only crimp for rifles with tubular magazines where there is going to be in-line stress on the bullet. I also recommend the Lee if you are having problems with loose bullets, but if your press is properly set up you should not be having problems.

 

[99mpower]

I run a little tighter neck tension, but I dont crimp either.. .5-.75 MOA accuracy in all 6 different semi-auto platforms in 223/306/6.5cr

 

[OkieMike]

Picked up a couple semis in 6.5 CR and .308, should I crimp for the semis? Thanks

If the bullet doesn't have a cannelure then don't crimp it... If it does have a cannelure then you can test it and see if it makes any appreciable difference. Your gun(s) might like it, might hate it, or might not care.

Mike

 

[roostercogburn98]

I’d probably only really worry about crimping if it was a tube fed gun. I don’t crimp anything I load

 

[Wildfire1550]

Appreciate everyone’s help