I bought a new RCBS 243-095-SP, and the finish and fit are good. Issue arises when you want to open the mold. If you use your hands to pull the halves apart, it's just so, no slop. Try with either RCBS or Lee handles, and it hangs on one pin every time. Tried turning the block end-for-end, but the same pin binds.
The pin that does not bind is .140" high.
The pin that binds is .153" high.
I ran through @ 50 bullets casting, and having to jerk the handles apart to open the mould causes some boolits to fly off and land on concrete.
Buffalo Arms said to contact RCBS. One RCBS tech brightly said he used all RCBS gear without a problem, but did not answer the pin height question.
Sent another note today to RCBS, titled alignment pin height, asking very specifically, what the height is.
An idea to make a precise seating jig: take a piece of flat stock, mill a pocket .140" deep. Take the block half with the pins, place the stock over the pin, stick er in a vise, and close it. When the stock goes flush to the mold face, the pin should pretty well be .140" high.
RCBS is doing this: