Blackpowder data for 125gr RNFP
I've been loading the Lee 358-158gr RNFP over 18gr. Goex FFFg with good results. However I have cast a good supply of the Lee 125 gr RNFP and would like to load those up with the Goex as well. Problem is, I can't find any published data for black powder and the 125 gr. in 38 special. I get really good compression of the 18grs under the 158. There would be slightly less compression, but enough to insure no air space with the same charge under the 125gr. bullet. Would I be good to go with that same charge under the lighter bullet?
Anyone have any pet loads and/or published data using the Lee 125 gr bullet with holy black?