I've used 700x for loading multiple 5" 1911's (45 ACP), a pair of 3" Colt Defenders (.45 ACP), Beretta 92FS and a Beretta PX4 Storm Sub-Compact (9mm). With the shorter-barreled offerings, it took a bit on the higher-side of the loading-data spectrum, but worked well. Groups were well placed and it seemed to cycle without as much recoil as previous choices I'd used in production-ammunition. As for the typical 1911's, it cycled fine in all and worked extremely well in one, but wasn't grouping as well with the other two I tried that day. Then again, if memory serves me... those other two 1911's were the last I shot after a very long day of shooting a lot of rounds testing load-development. Could have been me.
A couple of the shorter pistols, (Defender and Storm Sub-Compact), that I tested that day belonged to my mother. I gave her rounds loaded in a few different powders, (using 230 gr. bullets in .45 ACP, and 125 gr. bullets in 9mm), that worked well in those two pistols and asked her to see what she thought worked best. She couldn't tell much of a difference in recoil, but chose the 700x loads on her Defender. As for her Beretta, she chose the ones loaded with Power Pistol.
As for me and the 1911 that shot well using 700x, it worked well with both 200 gr. bullets (4.6 gr.) and 230 gr. bullets (4.4 gr.). I didn't have any other bullets to try in the 45 ACP, so that's all I had for testing. The 92FS worked fine with all of the powders I tried, and the 700x worked well a grain or two from max-load using the 125 gr. bullets (4.0 gr. and 4.1 gr. used were almost exact in performance and accuracy).
Agreed - the load-threshold using 700x is narrow, but it has worked in my testing just fine. As others have mentioned, a little goes a long way. Personally, it seems to like the shorter-barreled pistols that I had on-hand for testing most... but, I'd use it since I have developed loads working with it. Hope it works well for you.