Been reloading 12 gauge with Winchester AA Super Handicap powder (because it's the only powder I can find). I am having a terrible time getting it to drop consistent powder charges in my MEC reloader. It can vary as much as 1.5 grains between charges. I tried adding a powder baffle, but it didn't help. It's definitely an issue with the powder because other powders are very consistent.

Have any of you had similar problems with this powder?