07-14-2018, 10:44 PM
The arp bbl ext on the predator is standard, set for .136" bolts.
I use a Grendel bushing die, with .266 bushing for Hdy brass. You will need a couple intermediate ones for necking down the first time. Then a Hdy 6mm seater die.
I use a Grendel bushing die, with .266 bushing for Hdy brass. You will need a couple intermediate ones for necking down the first time. Then a Hdy 6mm seater die.

