I have recently purchased an MEC 600 Jr. I also got a Universal Charge Bar Model C/CS. This weekend I had the chance to use it for the first time. The round to round variation in powder weight is quite large. Do you know how I can get more uniformity?
I don’t think that the powder variation is due to the Universal Charge bar. I’ve used the Universal charge bars for many years and have never found them to be more or less accurate than ordinary bushings as far as consistent drop goes. The single station presses are “bumped” five times per shell during the loading cycle. This makes it vital to use the same technique and pace from shell to shell if you want powder consistency. Do make sure to lock the settings on your Universal bar with the little Allen key so that it doesn’t shift though that has not been a problem area on any of my Universals.
The first thing I’d do is to get a powder baffle. It fits between the powder bottle and the charge bar and evens the weight pressure on the powder.
If that doesn’t cure it, try switching to a powder with a medium grain size. I’ve found that powders like 800X, with grains the size of pancakes, often meter poorly. I’ve also had trouble with very fine powders like Titewad because they seem to attract static electricity and that can cause inconsistent drops. No amount of dryer anti-static towels or grounding wires helped with the static when I tried those fixes.
Also make a point of keeping your powder bottle between 1/3 and 2/3 full. Not more. Not less.
Another thing- make sure that your powder bar is traveling fully to the end when you push it over. A partial throw will give you a partial charge.
If that doesn’t do it, I don’t have an answer for you. Come to think of it, I’ve got an RCBS Grand that doesn’t throw powder as consistently as I’d like.
If any of our readers has some ideas I’ve missed, I’d sure like to hear from you.
Shotgun Report’s Technoid