I have loaded 1000's of these Berrys bullets. They are great. I used Rainer and switched.
I shoot them out of HK and Sig pistols. And I friend uses a Kimber.
My favorite powder is Clays, as it is cheap and very clean in the 45.
About 4.3 grains but check Hogdon's data. This is on the low side and might not work in your pistol.