Some_Mook
Insignificant Git
Something to consider, at least with a Traditions powder measure would be to disassemble it and apply a small dab of lock-tite to the thimble threads where it screws onto the measure scale rod. I had the thimble loosen up on mine and get poured into my Brown Bess along with the powder. Fortunately I noticed this had happened and was able to pour the charge out into my palm and recover the thimble. It would have sucked if I hadn't noticed before I loaded a ball...