A few years ago, I did some RL17 testing with a few different
calibers. It seemed to be at its best with heavier for caliber
bullets if the twist was tight enough to stabilize the bullets.
My .22-250's 1:12 twist won't shoot 60gr bullets well, so can't
give you any load with RL17 for even heavier bullets, but you
should have good luck with your twist.
It does a fantastic job in the .243 with 105gr A-Max's!!
