Lots of powders work great in the 45 like Bullseye, 231, clays, and unique for warmer loads.
Most any 12 gauge trap shotgun powder you have in stock will work for paper just consult the powder manufactures web site for complete data.
The latest "cool aid" powder is Solo 1000 among the steel shooters due to less smoke.
Just google "45 acp accuracy loads" I did that last year and came up with a list of loads that the 50 yard paper punchers were using, I printed them out and don't know where they are right now.
I think the most used bullet for accuracy was the 185 swc.
I have always used 200 gr swc cast.
hope this helps.
tom