While I don't know how well this will work for you, in my rifle I get groups of 1/2 MOA out to 600 Yds. (off a bench, with a scope) This is my standard match load for Service Rifle matches.
Cases: LC-00
Primer: CCI-400
Bullet: Hornady 68gr. BTHP
Charge: 24.5 gr. Varget
Needless to say, I can't guarantee accuracy or safety in your rifle. Use at your own risk. I have over 800 rounds through my rifle so far. Love the load. You will need a 7"-10" twist bbl to stabilize the bullet.

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Jay
"For God and Country"

Sounds about right. I shoot the same load behind 69 grain Sierras out of my Service Rifle. Works great.