Looks like she is going to be some shooter.
I had one of the rugers and was set up about like yours,below is 2 groups with 2 different bullets shot out of those junky rugers.The one I had sure liked those old cheap 140 gr core-locs also.
I had one in a rem mtn rifle also and it would shoot but sold those two to get a rem BDL in 260.I shoot 85 gr,100 gr and 120 gr in it haven't even tried any 129 or 140 gr bullets in it.the 120 gr works great on deer year before last I dropped one at 442 yd with the 120 gr.
The 260 is one heck of a deer rifle.