Just started using imr 4756 and gone through a few 1/2 pound cans with good suscess untill now. The tail end of one can was left in the powder measure . Opened up another and poured it in. Threw a few charges, right on the money where I left it. 100 rounds later...check the charge weight, one grain low?!?! Check again same.... bust out the old beam scale thinking my digi went belly up. same... one grain low. My load is 8.8g of 4756 under a 124 and which filled a super case to about 1/8'' below the top. I adjusted the powder measure to throw the same chage weight that I had started with and it filled the case right up to the top. So, were my first two cans heavy with mositure or is my new can of powder jacked? The first two cans were pretty consistant but the third was way off. what gives? I've never seen any powder varry this much lot to lot.