AR style rifles using Mihec .308 hunting bullet?

[Whistler]

What overall cartridge lengths do you guys use in .300 Blackout and .308 Winchester when shooting through AR15 and AR10 style rifles? Seat to crimp groove? Crimp or no crimp?

[winelover]

Always crimp, semi-auto rounds. It's the nature of the beast. I have that mold but it wont reliably feed in my Armalite AR-10A4. The meplat is too large and hangs up on the feeding ramp, most of the time. I prefer a spitzer shaped boolit.
NOE's 311365 or Mihec's Sil boolit.

Only you can determine seating depth for your gun. Seat a boolit until it very lightly engraves the rifling, without getting stuck, when you manually eject it. I suggest you do this with a dummy (no powder or primer) cartridge.

Winelover

[popper]

I use the accurate 165 style in my 300BO & AR 10, ~ 1800 & 2400 fps. Don't have any crimp grooves but use the FCD to LIGHTLY crimp both. Do NOT run into the lands, slam fires are no fun!