I received my MP 611-640 on Friday. Had a chance to break it in by heat cycling in the oven to 400*F x 4. I then lubed up the pins, sprue plate and alignment studs. I even lightly coated the pin at the advice of some members here. As soon as the mold was up to temp it was raining boolits. All of them keepers.
Nominal weight was right at 175gr sized and lubed with Randy's Tac1. I sized them to .411" The unsized diameter was right at .41225" per my micrometer.
Gonna load some up tonight and hopefully test them out tomorrow.
41 Mag fans rejoice. I think I'm gonna like this mold.