I had a chance to fondle a SR1911 in 45ACP and I was not impressed. (almost new gun, only a few magazines fired through it)
I realize it is just an assembly line gun and not custom fit but....
Slide to frame fit was pretty loose. Had significant side to side slop and up and down slop.
Barrel bushing to slide fit was loose and the bushing to barrel fit was no better.
I remembered a thread either on this forum or another one about loose lockup on a SR1911 (commander size) and the guy posted a video. (below)
I measured .010" of slop in the vertical lockup.
It also had at least .005" to .008" of horizontal lockup slop.
Maybe I'm expecting too much from an assembly line gun, I have not handled that many.
If your Ruger is anything like the one I handled or like the one in the video, I think you would benefit the most from a new barrel and fitting bushing (like Ken_Mays said)
I'd get a Kart Xact Fit Barrel and their fitting kit. It would probably make a world of difference.
Ruger SR1911 Commander barrel movement at lockup.