Fellers somethings been perplexing me for a time so I figgered I'd ask. Whenever I'm working with a new mold/different alloy or making any other changes I cast up a hundred or so, run some thru the sizer, lube some and push a couple thru the 450 and I always save about 1/4 of the run that I don't do anything with. I keep them just as a control group. All the boolits are boxed up and labeled with bhn/date cast and any other info. I got into a batch of .358's I cast over a month ago and they've been sitting on the shelf. Anyways, measured as soon as cooled to room temp they mic'd at .360. Those run thru the sizer (Lee push thru) and the 450 sized down to .358 or .359 depending on which sizer I used. And a month later...still .358/.359...no change. But, the control group which had nothing done to them now measure .362/.364 in diameter. How can they grow? How is it even possible? Audie...the befuddled Oldfart..