The Lee Perfect has a patented wiper in it that causes it to do better than most with stick powders, though you do want to anchor it as rigidly as possible. With fine spherical propellants, like your 296, the Perfect is known to need some attention as the fine powder tends to leak out of the drum until you get it broken in, flashing removed, and drum tension correct. For ball powders I prefer the cast iron drum measures (RCBS, Hornady, Redding, etc.), or the horizontally adjusted drum measures. But if you are willing to spend some time and effort on the Perfect, it will come around. For stick powder for the .30-06, the Perfect is actually a pretty good choice, IME.
Next question is, just how inconsistent is the measure you have now?
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