The barrel came in today and I got the rifle put together about a half hour before dark. After 2 zeroing shots at 50 I shot 5 of the 55 varmageddons I had loaded with 2200 powder . It threw one about 2" out and one about 5" out. So I ran back inside and grabbed some of the 60 grain Sierra hollow points loaded with h4895 that my 16" 10 twist likes. It put 5 in at .75" center to center. I made a small scope adjustment and shot two more. They were for right at an inch but still a little high. I adjusted the scope down a little more and put the next three at .750" and it was dark out. I was shooting five or six different headstamps which is not something I normally do but the primers in the two PMC cases were smashed flat. Those cases weighed basically 1 grain more. Being nearly dark, shooting severely mixed brass and a 9x Scope with crosshairs that completely cover a dot I could barely see I'd say it looks pretty promising with the 60s. It was too dim outside to chronograph but with h4895 they're probably only 3,000 feet per second but I will try some different powders when I get a chance.
Pretty convenient it will shoot the exact same load as my other 6x45 though. It basically shot as good as I could hold it tonight.