You'll need talley mediums for a 40mm, highs for a 42mm and extra highs for a 50mm.
I have the same rifle in .308, I know I'll have to post pics for most to believe but mine's consistently hovering around the .5" @ 100m. Shoots the same cold or so hot you can barely touch it (which is only about four rounds).
One issue with the example I have, when a round is chambered, it sticks about 1/2 to 3/4" before closing the bolt. Take forward pressure off, then reapply and the round chambers. Drives me crazy! I think I need a smith to take what must be a burr off the opening of the chamber.