My plinking load is 4.5 grains of unique behind a 158 grain SWC. My buisness load is 5.0 grains unique behaind a 158 grain LHPSWC. I believe I read somewhere that the old FBI load would be duplicated by 5.4 grains of unique behind a 158 grain LHPSWC. I would advise you to work up to these loads while looking for signs of high pressure. I don't mind powder residue all over the gun and my hands. It makes me feel like I've been shootin.
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