In the early 90s I shot IPSC open division with a single stack 1911 45ACP.I used a Ed Brown "4 star comp"and in order to get the comp to work somewhat efficiently I used 155gr SWC bullets loaded to major.It sort of worked but when I finally got a comped 38 super I was amazed at how a high pressure round like that works the comp compared to the 45.
Truth is that compensators really dont work well in a low pressure round like the 45 and the bushing compensators are a complete waste of time(unless you want it for the appearance).Theres a reason that you cant find many manufactures making comps for the 45 and as a round the 45 doesnt recoil all that hard anyway.