I agree with what has been previously said by big country and bronko about powder throwers. I have an RCBS unit that I use only for my handgun loads using H4227. I also periodically verify what it's throwing using my beam scale. I load ALL my rifle loads using the beam scale. Used to use an electronic balance, but found out I couldn't trust it. Most large rifle powders are generally too coarse to feed well through a thrower, in my opinion. Due to their size and shape, it becomes difficult to keep the voids in the filled tumbler uniform, which in turn results in uneven charge weights being thrown. This is why a finer graded flake or small ball powder more suited for handguns will work better in a thrower. I would advise you to stick with the beam balance.