The thing with Springfields, I have a total of 259 1911's in my collection so far, the current batch of Springfields, GI, Mil-Spec and loaded all seem to be made to match grade tolerances.
In the past month I've obtained 3 GI models, 2 stainless and one parked, and 3 Mil-Specs, 2 parked and 1 stainless. On all 6, the fit IS AS TIGHT as the custom Nighthawks, Wilson's, Les Baer, RRA, and Turnbull 1911's.
For the Springfields, take them apart, clean and inspect each part, then lube it with whatever you find that works for you, for me, I'm partial to Wilson's Ultima-Lube, as it stays where it's placed, does not attract or collect debris, and no matter how hot the weapon gets, it functions. After that, get some lube, and place it on your rails and simply move the slide back and forth loosening it up a bit to give it that smooth glide.
Rugers are hit and miss sometimes, the two that I have are nice and tight, both cocked and un-cocked, though I've seen some brand new at the range that needed to go back to the factory to correct movement pertaining to barrel lockup.
On a carry 1911, I have ALL of my 1911 rotation's trigger pull set at 5.5lbs. A good, clean crisp 5.5lb pull is not going to detract from the weapon, but will give you enough resistance to not go off by accident, but rather by deliberate pull. One of my quirks though, is I prefer the short trigger on all of my 1911's, the same triggers found on Springfields GI and Mil-Spec models, I guess it's a holdover from my military days, but mainly because I've shot 1911's that way for 44 years now.
Change your springs every 3k rounds, use wolff extra power springs, and for magazines, back in the 80's, when Pachmyer went out of the magazine business, I purchased all their 1911 and BHP inventory as they made the best sts mags available. I also like Kimpro-Tac mags and those 7rd Remington mags. I prefer the rounded and enclosed feed lips on those mags, plus the stiff, good quality springs used. Also, I number each magazine, and in my OCD'ness, each weapon I own has it's own Maintenance log, where I keep track of everything done with that weapon, I also maintain logs on my magazines so that I know when to change out springs. Duty and Comp mags get swapped out q5k rounds while range practice and fun mags get swapped out q10k rounds.
Another item, while I love my Rugers, and this is MY OWN PERSONAL OPINION, to those who like to jump on personal opinions, I, that's I prefer forged uppers and lowers, not cast. Mind you, there is nothing wrong with a finely cast frame, as in Ruger, it's simply that I put 50 rounds daily, and up to 1000 rounds on weekends through my 1911's, and I want a frame that's going to hold up under that strain. And yes, cast frames most likely will, my Taurus PT92 with it's aluminum frame has already held up to 123,937 rounds. As I said, it's MY preference.