I don't know what to say. After sending a Lee 230gr Tumble Lube 6-banger back for the second time, daft me ordered two new molds of the same brand, a 22 Bator and a C312-185-1R from MidSouth (of course). I just got them this week and tried them tonight.
Minimal prep, and what do you know, they both work great... bullets drop right out... band dimensions slightly oversize, .227" and .314"... bore rider on the C312 is exactly .300". Hornady gas checks just slip on with fingers but grab on tight after putting through a .310" sizer. Wow. This is the way casting is supposed to work.
I'll have to find something else to complain about now.
-HF
PS Yes I have a rifle with a .310/.300 bore.