It's a single cavity Ideal mold #429352 that casts about 250grs with my alloy. A previous owner had modified it with a couple of vent lines. I also have a modern bond knock off of Lyman's 358344 which is almost an identical design as the .44 except it has two grease grooves. I plan on loading it non +p for my Colt Cobra.
I agree with you concerning its nearly full calibre meplat, which rhymes with splat.