I'm having to learn to shoot a 1911 all over again, it's that different from a 5" Gov't model. The balance is better, but recoil is a more snappish, especially with 230 RN.
But - I misinformed everyone. It's a REMINGTON R1 'Enhanced' Commander, not a Ruger as stated in my OP. A good clue is the huge [REMINGTON] logo on the left side of the frame.
I've been comparing it to my wife's two SR1911s and the Rugers pale by comparison. The Rugers rattle when you shake them. The Remington is as tightly fitted as my Series '70 Gold Cup and has a trigger almost as good. I expect it to improve a little with shooting.
The only other gun I have that is as tight is a blued 5" R1 that came with a superb trigger right out of the box. It's my 'go-to' 1911 and I shoot it box stock in IDPA and Wild Bunch. Well, not quite stock - I installed a long trigger.
First thing I did when I got home was to change the grip panels for a set of rosewood SR1911 panels with less aggressive checkering.
Those on the R1 were downright punishing with 230 gr loads! The Ruger logo on those grips will undoubtedly cause confusion in minds other than my own.
I think I'll slim down the wide safety lever as it is a pretty broad shelf, patterning it after the Ed Brown ambi safety levers on the SR1911s. But that can wait until I've put more rds down range.