heavy bullets for.45 acprevolver loads

[floridaboy]

I have a Ruger convertible in .45 Colt/ .45 ACP. I use 255 grain bullets in the Colt cylinder, and would like to use them in the ACP cylinder as well. Can anyone suggest a load that would get close to 850 fps?

 

[pinkymingeo]

AA9 works very well. The published range is 10.8-12.0 (45AR). The max load gives me +900fps in a 5" barrel, and can easily be exceeded in modern guns for 1000fps. Some guys start with the max published Unique and keep adding until they get in the 1K vicinity. Tough to beat that 12.0 AA9, though.