OK, well I'll still bring alomng some 77s. They shoot fairly well from my 1/9 AR with a 16" bbl. Who knows, they may fly in the Ruger.

But, I hear you on wanting to find happiness with factory fodder. I've only had about 1.5-2.0 moa accuracy from the 55gr milsurp stuff, but that was in the ARs.

The Hornady 68gr BTHP should be a good baseline test for sure.