What's a good powder for 900 - 1000 fps with a 300 gr. lead pb in a 45 LC Blackhawk?
Problem (?) is, I have over 35 lbs. of 300grs. boolits on hand and close to 8 lbs. of your 255 grainers. I will look into Longshot powder. Thanks.For myself I stick with 250g RNFP or 255g SWC bullets. But I did test some heavy bullets with Longshot for a club friend. 285g SWC, 300g FNGC, and 320g FNGC bullets. For the 285g SWC, 300-320 bullets 10.0g or 10.5g of Longshot will get you where you want to be for ~1000fps. I marked the loads as 'accurate'. These was shot out of 5 1/2" BH. YMMV.