I am going to give a pitch for Bullseye. The original 45 ACP load used in the 1910 development cartridges was 5.0 grains Bullseye with a 230 FMJ. The velocity was specified to be 800 fps. This is a classic load, been used in at least two World Wars, multiple bush wars, and among Bullseye pistol shooters, it is a well known and well characterized Ball load.
I like faster burning powders in M1911's, the initial pressure peak is fast, but the pressure curve drops quick. So the action is given a swift kick at the beginning yet pressure drops at unlock, not accelerating the slide to levels that cause frame peening. Given that this powder is the original powder in this cartridge, it is a very safe bet that loads developed with it are going to function the pistol.
Your pistol is a short barreled thing and I do not have any experience with them. I have lots of experience with the 5" versions. I have shot shorties and the ones I shot were temperamental at the range, don't know if that is a characteristic or not.
I know some claim that you should use cast lead bullet data with plated bullets, but I had function issues with my plated bullets at the low end. I was testing target loads and my pistol would not function with my 25 yard rapid fire cast bullet load. The plated bullets functioned with my 50 yard load, which was a half grain more of Bullseye. So, be aware, plated bullets require some tinkering.
I would try your 230 plated with 4.5 grains Bullseye and then 5.0 grains Bullseye before trying any 4.0 grains or less.
Kimber Custom Classic M1911
230 LFN Bull-X 3.5 grs Bullseye Mixed Brass WLP
OAL 1.20" taper crimp .469"
8-Jan-06 T = 61 °F
Ave Vel =643.6
Std Dev =14.07
ES = 63.63
High = 679.9
Low = 616.3
N = 32
shot a little high Pistol cycled each shot
230 LFN Bull-X 4.0 grs Bullseye Mixed Brass WLP
OAL 1.20" taper crimp .469"
8-Jan-06 T = 61 °F
Ave Vel =715.9
Std Dev =11.45
ES = 48.32
High = 742.9
Low = 694.8
N = 32
shot a little low
230 gr LRN 4.0 grs Bullseye Mixed Brass WLP
OAL 1.250" taper crimp .469"
29-Jan-06 T = 68 °F
Ave Vel =698.8
Std Dev =10.19
ES = 36.33
High = 713.5
Low = 677.1
N = 28
Little High = put close point of aim V. Accurate
230 gr LRN 4.5 grs Bullseye Mixed Brass WLP
21-Jun-06 T = 97 °F
OAL 1.250" taper crimp .469"
Ave Vel = 805.2
Std Dev =11.4
ES=54.08
High=836.9
Low=782.8
N =32
230 gr FMJ (R-P) 5.0 grs Bullseye 99' & 2005 mixed lot Mixed Brass WLP (brass) OAL 1.265" taper crimp .469"
12-Dec-11 T= 53 °F
Ave Vel =793.5
Std Dev =18.92
ES = 61.99
High = 817.4
Low = 755.4
N = 16