Lee Mold

[686]

i bought a lee 150 gr 358 rn fb mold . casted one day a little slow , only using the one 6 cav. mold. the bullets were filled out good. the next day i pushed it . as soon as the spru was hard enugh to cut i did. i cool the spru under a fan. the bullets were not as good looking and when i went to size them some were under size to the point some bands were not tuching the sizer. i know i had it hot but thought it would fill out better . is the bullet srinking in the mold from being to hot? both days i used the same lead mix and pot temp.

[dwtim]

If the sprue cools too fast (or is cut prematurely), then wouldn't that prevent the cavities from drawing in additional metal as they cool?

[686]

that could be what happened. i will use it again going slower to see if they come out right again.