Cast bullet weight variance ? Nov 10, 2023 11:34:35 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by tullymars on Nov 10, 2023 11:34:35 GMT -5 Yes on the pre heating.Warm the mold on a hotplate while pot is getting up to temp. As cast diameters ran roughly .433 to .435. Which is ok with me cause I size to .431 for both of my NM Blackhawks.