For the Grendel I like 1:8 and my favorite Grendel is a 1:8.4 which handles the 129gr LRAB bullets out to 600 yards very well from the 22 inch tube. Might consider 1:7 if I ever do the a 12 inch barrel build.
On a different note, when I rebarrel the 22-243 it will go from 1:8 to 1:7 for the 90gr bullets. I cn get the 90gr Berger VLD bullets shooting well from the 1:8 barrel but that is driving them as fast as I care to in my rifle and between 500 and 600 yards accuracy starts to be decline
I want a bullet to be stable throughout the distances I will be shooting it.
On a different note, when I rebarrel the 22-243 it will go from 1:8 to 1:7 for the 90gr bullets. I cn get the 90gr Berger VLD bullets shooting well from the 1:8 barrel but that is driving them as fast as I care to in my rifle and between 500 and 600 yards accuracy starts to be decline
I want a bullet to be stable throughout the distances I will be shooting it.