LEE autodrum questions

I have a LEE autodrum powder measurer that has given me good service for a few years. I liked it so much I got rid of my Hornady powder measurer (unused) from my Lock 'n Load progressive after I bought one.

Now for my rub......

It has functioned perfectly for pistol duties, all the time, every time.

I changed the necessary parts to swap over to 223 (not the first time I have used it for this caliber)...the riser and drum (which was preset from previous use)......and now I cannot get it to throw consistent charges. I can be off enough to make the RCBS beam scale not even move....with 24.0 grains of TAC.

Any suggestions?.....

FWIW, I can tell you that the drum isn't going to top dead center, nor top dead bottom either.....and if I adjust the riser any more it is out of adjustment.

Thanks.

Oh, and I forgot to mention that it can hit the 24.0 grains perfectly when it wants to.......

It could be static that is the cause.
I suggest that you wash the hopper out in warm soapy water, dry it off and then run some powder through before throwing charges.
ukrifleman.

It’s normal for the Autodrum to not go completely up or down due to the inherent lack of precision in the gear train. One way to enhance a full drop is to tap the powder drop body a few times with a dowel both as it’s filling and as it’s emptying. A little extra vibration may be all it takes. Another idea would be to add a powder baffle to the hopper for more consistent drops.

Are you giving lt enough time to completely fill and to completely empty on each stroke? IIRC Lee suggests 1 second for each 10 grains for both filling and emptying.