Anybody have any luck with 429421 in the 444?

[Marlin Junky]

I want to cast PB's for my Marlin 444 (Ballard rifling) and was wondering if a 4-C Lyman 429421 would be a good match. Looks like the rifle mikes near .431".

I'd also be interested in the as-cast diameter of current SAECO 430 molds.

Thanks,
MJ