LEE pro auto disk and IMR 4227

[steelworker]

I'm loading IMR4227 in .44 mag. I would like a charge of 21.0 grains. I can get that on the 1st case, but after that, all the charges vary. Considerably. They are all lower than I want and range from 20.2 to 20.9 I have used a double disk set up (.71 chamber on top and .88 chamber on the bottom) and tried the adjustable charge bar with the same results. What is going on here?

[jimkim]

Have you broken it in? Have you cleaned it? I have the old Dupont IMR-4227 and with I've had no issues at all. It consistently meters in my Uniflow, LNL, PPM, and LAD. I did get a small piece of trash in some Promo once and my charge weights went wild. I dumped the hopper and cleaned it, then repeated the process several times before I saw it fall into the jug. I ended up sifting it out. Since then I've had no more problems.

Did they change the grain size? Sorry for the hijack.

[steelworker]

It is brand new. What is there to clean? My other Pro auto disk measures worked great right out of the box.

[Mike Hughes]

Are you using a new powder thru die? The dies come with a coating of oil, and if not cleaned you will get inconsistent charges.

[1bluehorse]

Seems I remember the directions saying to run two or three hoppers of powder through the measure to "condition" it...I bought mine quite a few years ago so maybe they've changed that. Plus 1 on cleaning the dies.

[steelworker]

The powder thru die was clean and dry. I will also run several hoppers of powder thru the measure and see what happens. Thanks for the advice!