The proper load on Black Powder in any cartridge is whatever it takes to fill to the base of the bullet plus a little so the powder is compressed. REALLY!!
In .38 S&W I would use FFFg loaded so the un-compressed change is no more than 3/16" below the case mouth, then seat the bullet to the cannelure. Be sure to use a lube like SPG, not commercial cast bullets with a hard wax lubricant.
Last edited by Alk8944; 06-13-2015 at 08:12 PM.
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