15.0gr. Trail Boss for me with cast bullets in my little 35" bld. .45/60 Sharps gives same accuracy with fairly hard cast 385gr. GCRN's as BlackPowder with 506gr. and 525gr. bullets. The velocity is 1,100fps with the light bullets and 1,180fps using Black Powder with heavy ones.

Every rifle I've tried it in has liked it, so far.