That's a nice little rifle jwhite. And it sure shoots well!
I've just finished working up a load for my Cz 527 in x39 with the Hornady 123 grain and AA 1680. I read some years back an article by C E Harris (I think it was him) that pointed out that the book loads for the x39 were built around the AK/SKS pressure level. Forty thousand. The 527 was a fifty thousand psi action and his Ruger M77 was good for sixty.
So I've been able to get 2,750 fps or so with no pressure signs whatsoever. Impressive little rifle.
I'm going to a gun show soon I have to look and see if there's a Ruger calling my name . . .
Cat