I have 2 Rem 700 .308. One with a rate of twist of 1-11.25 and the other with a rate of twist of 1-10 their suppose to stabilize heavier bullets.
Jonnybender
I haven't chrony'd my 225 load yet, but I'm hoping I can get 2450 out of it. With that speed, it's still no 7mm 180gr, but the numbers it gives back are pretty darn good. For KD shooting it'd be tough to beat without cranking up the punishment.
Most refer to heavy as being 190-208. 220 is.... well. yea.
If nobody responds try a 1-10 and see what happens.
Why do you want to shoot such heavy rounds?
Let us know what you find out. I assume compressed powder charges too?
I'm starting to test 190gr SMK's, but I have been wanting to play with Amax 208's as well.