So this is my first post, and I admit to following the boating section much more than the handloading section... but I haven't found much searching for this...
I have a dillon 550b that I have reloaded a couple thousand .223 with no problem. I recently started loading my .338 win mag. I am using the magnum powder bar, and throwing (or trying to anyway) a 64.5 grain charge of IMR 4831. Even with the 223 which was very consistent I still weighed about every 10th round. Never had an issue. Loading up the .338 though, I can get almost a grain of difference in weight, up and down. I have run about 100 rounds through the machine. I don't have a different magnum bar to put in, and obviously the small powder bar for the .223 won't dump enough.
Any ideas? Do I buy another magnum bar? Change powders and try again? Dillon seems unsure, says it is probably my setup. Not saying anything bad about dillon, I have called with some stupid questions, and they have always walked me through to the solution, and have always stood behind their product.