I've used AA#7 in 45auto, 9mm, 357mag and 30-30 with cast boolits. I always keep AA#7 on hand since it's a little faster than #9 it tends to work better in my 3" SP-101 (357mag). And after discovering the joy of shooting cast boolits in the 30-30 with "pistol powders", AA#7 has become my favorite just slightly edging out A-2400 and Unique. I use more AA#9 than anything else, but I always have the AA powders 2,5,7 and 9 on hand ... more so now since Alliant powders (specifically Unique and A-2400) are very scarce.
forgot to mention I also have loads for 44 mag and 44 spl that use AA#7, mainly with cast bullets (which is over 90% of what I shoot).
To me, AA#7 is kinda like Unique in it's versatility .... it may not be the "best" in anything, but it will work well in a whole lot of things. Actually, I found that it may actually be better in my 3" SP-101, 357 mag, as it has a faster burn rate than my favorite (AA#9) and tends to have a more complete powder burn and a lot less muzzle flash - with slightly lower velocity from the 3" barrel. Just my experiences.
The LEE 2nd ed. lists Accurate #7 first in the lists for 9mm (115 gr cast or jacketed) and for .45 acp (230 gr cast or jacketed). I do reload and shoot both of those, a lot less than revolvers and lever guns, and AA#7 has always worked well in the "bottom feeders" for me.