I own a Remington XR-100 chambered in 223.
It likes the Black hills 50G Vmax Factory loads.
It also likes 25 Grain of bench mark pushing a 55 Grain Vmax.
The 50 Grain Vmax pushed buy the Black Hills does massive damage to ground hogs under 300 yards. In fact I almost hate reloading for my 223 be cause the Black hills stuff works so good.
I will reload for my 223 any way though I gotta get my moneys worth out of the dies.