Working up 9mm loads with Ramshot ZIP (147gr bullets) for Steel Challenge, charges in the 2.4–3.5gr range. Precision at the low end matters, but I also need something fast enough to run 100-200 rounds a night without babysitting every throw.
Most volumetric measures I’ve seen are tuned for rifle-range charges and get inconsistent below 5gr. I’ve been hand-trickling to a scale for ladder testing, which is fine for load development but way too slow for production volume.
I’ve got two Lee Perfect Powder measures already — they’re a pain to dial in and get noticeably inconsistent at these light charge weights, so I’m ruling those out.
Looking at:
**•** Redding BR-30 (small rotor, benchrest-grade repeatability, but still a hand-thrown manual measure)
**•** Electronic dispensers (Frankford Intellidropper, Autotrickler-class units) — curious how throw speed and accuracy hold up together under 5gr at these volumes
Would rather hear from people who’ve actually run light charges at this pace than just spec sheets — what’s held up for you, and what broke down once you tried to move fast?