Measuring with a micrometer I get 0.4491" below the shoulder and 0.4555" above the shoulder. I didn't think to measure length before putting everything back together but the MBF powder funnel appears to be about 1/10" shorter than the Dillon on the expander portion.

My MBF powder funnel works great with jacketed bullets but I've not used it enough with lead bullets to give a recommendation.

I've only loaded about 250 of the 357 Magnum with lead bullets and have been using a single stage with a Redding Competition Pro 3 die set and RCBS Cowboy expander. Seems to be working well so far, even with virgin Starline, but I'd like to get set up for 357 on the Dillon soon.