This is the 38-90-RN. I have 2 of these. I've never cast from this one but the other I use for my 38 Special. It casts large enough to size .358. I use it with 2 grains of Bullseye. I would think this mould would do the same. It is fitted with Magma keys & a Magma sprue plate. No junk here, it should preform as new. The mould is 83.99 at Graft & Sons. Magma would charge you about 60.00 for conversion it to the Master Caster plus all the shipping. You can have this one for $80.00 shipped.