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From the Lyman #48 manual...
115 cast lead bullets
W231 3.1 - 3.8 (best powder); 900 fps
Unique 3.2 - 4.0; 835 fps
Personally, I'd stick to lead, but if you must shoot jacketed...
86 gr JHP
W231 3.2 - 4.7; 1022 fps
Unique 4.1 - 4.8; 967 fps
90 gr JHP
W231 3.4 - 4.5; 937 fps
Unique 3.6 - 4.8; 865 fps
With both jacketed bullets, the max load of Unique was rated best, while 231 worked best with cast. You could split the difference and use 3.5 of W231 with any of them.
Those loads are for Colt or S&W revolvers in good condition, btw.
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