Yes, I have two of the RCBS powder droppers and they like to choke on the big kernels and you have to force it to cut one of them or jiggle it back-and-forth every couple of throws which can cause the powder to settle and lead to overcharges if you are close to the target weight. This is the thing that brand Cole the maker of the Prometheus warns you not to do and I have always guessed that he made some modifications to the RCBS one that comes on the Prometheus so that it is better radiused to deal with large stick powders - but that is just a guess. I have likewise assumed that Adam McDonald tweaked the one on the V3 to avoid this problem.
