I've been using a RCBS Uniflow powder measure for about two years with no problems encounterd. My last batch of .243 Win, which I hand weight every charge I noted a large variance in the ammount of powder being dropped. I was using a Pacific powder scale to weigh these charges , some which didn't even make the scale arm move ?? The powder I was using was H 4831 SC, has anyone else had this problem? Is there something going on with my powder throw?