Hi
I have been using reduced load on 30-06 6,5x55 and 7,62x54, initially I used to insert cotton as a filler but now I don't use it anymore. For lead bullet as suggested you should move to a pistol powder. I tested some N340 (because here is easier to find Vithavuory than American powder),then because I shoot fmj bullet I tested the N110 with very good results, the precision is matching the full load charge.