Cheaper than Trailboss, and very consistent in small amounts in large cases, is Titegroup. Hodgdon lists 3.1gr at 4k CUP with 55fmj in 223 for 1064. You can go up from there. Slowly. Really impressive stuff in cartridges as small as 17 Fireball and 22 Hornet, on up through very reduced cast loads in 30-06.
