Well, I got my 309-109-2r the other day, and today I cast with it for the first time. Quick rub in acetone, lightly sooted cavities, pre-heating on hot plate, started casting with unmodified nuclear medicine lead (mine requires high temp, 780F in fact). After a few pours, some nice bullets started showing up. And at the end of the session, the mold seemed nicely «broken in» already. Bullets dropped nicely, at perfectly round .310, and 115grs with this alloy.Below is a picture beside a 311-100-2r, for comparison. Remains to see if they will shoot.