You need a 6mm. Take the 6.8pc to 6mm and be set, (just like necking the 6.5G to 6mm).
The 6x6.8 or (6mm SPC) will take care of everything from coyote to deer.
Another would be the 6x45.
I have both for night & day rigs.
Both are very accurate easy shooting like the Grendel.
Dies wont run $200 and are had OTC.


Did I make you cry......boooo hooo, life goes on.