Just got an unused, new/old stock 358429. It’s consistent......358 on one side of the seem .3557 on the other, both cavities do the same.
Using WW, started w 2% tin, but upped it a bit trying to get the bullets just a bit fatter.
It acts like the alignment pins are too big. If I squeeze hard the mold closes just a bit more, and it’s a little hard to open cause the pins catch. If I squeeze the handles normally I’ll more then often get fins at the vent lines. Lubing them w syn 2 stroke.
I’m sure it’s capable of make 357+ bullets, just need to figure out what it needs to do it.