RE: 12 ga load?
 

Yep the old 57.Those are smaller than the primers we have these days.I think those old black Rem hulls also require a fiber wad below the plastic shot wad.Either way I haven't found any load info for them.Two of my manuals are from the time I bought the shells including Lyman's 2nd edition and another by Ed Mutunas.Nothing in Lymans latest edition either.

RE: 12 ga load?
 

NEVER HEARD OF THE OLD 57 i LEARNED SOMETHING ,THANKS AGAIN,CHUCKELL