.32 ACP Ammo Tests
Regarding the 1911, my Dad was a member of his regimental target team in the US Army before WW2. (He served thru the entire war in the 3rd Inf. Division, 7th Regiment.)
Dad said that he would go to the armorer, with whom he had an "in" do to his being on the target team, and they would disassemble a number of 1911s. He said that they would put a slide in a vise and squeeze it to achieve a tighter fit to a frame. I assume that the fitting that then took place was to achieve a good feed ramp match and a tighter bushing to barrel match.
My own 1911 is a Series 70, which has the "collet bushing," consisting of 4 spring-loaded fingers that grip the barrel positively with no clearance. The weapon shoots better than I can, and in my younger days when my eyesight was better, I was able to reliably place ten shots in the black at 25 yards.

Upper left: my 1911 Series 70, with Pachmayr grips. I have smoothed the feed ramp for reliable loading and installed an aftermarket "long trigger," which has an adjustment for overtravel. The sights are non-adjustable, which I like, because they are the most non-obtrusive for carry and are right on for range work with a number of loads. (I also cast bullets for my reloading of .45 ACP)
Upper right: Chinese Norinco M213 in 9mm, a modification of the Soviet TT33. Very reliable. The machining is crude, as is the finish. It is pretty heavy.
Lower left: Czech Cz50 in .32 ACP. It looks like a Walther, but is a different design. Double action and very safe. It is a natural pointer, well made and nicely blued. Replacement of magazine springs cured a feed/jamming problem.
Lower right: Czech Cz52 in 7.62 x 25. A single action semi auto with a hammer blocking safety and a trigger operated firing pin lock. Uses a roller lock action, where the slide works straight back with the barrel in a short recoil operation, but the barrel does not tilt. It unlocks from the slide by a pair of rollers in the sides. Very well made, parkerized (phosphate) finish, and much lighter than the Norinco. To shoot, it suffers from the grip angle problem, just like the Norinco.