Help! Lee Pro powder disk only goes part way sometimes.


December 15, 2009, 05:45 PM
The disk on the Lee Pro Auto disk is occasionally not going all the way over to drop the powder charge. I cannot see what is wrong. It is not because of not moving the press lever all the way. I'm very concerned about this as I've loaded several hundred rounds. Any help will be appreciated. Thanks

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December 15, 2009, 06:01 PM
Make sure the peg is in the slot. I missed it once and it did the same thing that it sounds like yours is doing.

December 15, 2009, 06:11 PM
I've done what you are talking about too. It was only happening occasionally and I think I may have found the problem. This mixed brass I bought has a few .38 special rounds in it. At least it with the .38 it will do what it was doing. I've only found one. I weigh my powder charges regularly. This scared me more than usual due to the fact these are very light loads for my 13 year old daughter to shoot.

December 15, 2009, 06:17 PM
make sure that you have the top part (with the the hopper) so that it will drop the charge into the hole in the disk. You might have it turned 180 degrees out..

December 15, 2009, 06:47 PM
I've had a problem where AA#5 powder seemed to "gum up" the action of the disc. The small powder leaks from the hopper, gets between the disc & hopper, and disc & metal base, and the spring action then fails to bring the disc back to reload from the hopper. Found that loosening the hopper screws ever so slightly fixes it.

December 15, 2009, 06:52 PM
Sorry for getting over excited. I'm pretty sure it is the occasional .38 Special case in this mixed range brass I bought. Thanks for the help.

December 15, 2009, 07:21 PM
I have the problem too......only with 38 brass. I've examined them closely and still can't figure it out.

December 15, 2009, 07:37 PM
You know you need a different die for .38 Special on the powder through die. The one for .357 obviously won't work. The only time I have the problem it turns out to be a .38 Special round. I've got one for .38 Special on Ebay right now.

Jeff H
December 15, 2009, 09:46 PM
I had this problem recently and it turned out to be excessive play between the knurled nut and the aluminum thinge that gripped the nut.

I ordered a spare from Lee (in case I broke the cast AL) and took mine to the vice where I peened it much closer to the .125ish that the nut was. Problem solved and it works perfectly now.

Looking back on it, I probably bent the AL thinge with an improperly adjusted die.

oddly enough for this discussion, I only had this problem on 357 not 38 rounds since it was the only one that had a powder drop large enough to be affected.

December 16, 2009, 12:38 AM
Rusty's example is one that can happen without care in the setup: Make sure that the disk is installed with the actuating lever arm in the correct cavity--the slot. added on edit: the "correct slot" issue is really a problem for installing the ACB (Adjustable Charge Bar).

Another common reason was called out here, too--having the hopper retaining nuts (screws on the older hopper versions) screwed down too tight. added on edit: and, make sure that the hopper is oriented properly--it should not obscure the disk / bar drop hole.

Don't overlook worn components: components such as the elastomer wiper (on the Deluxe version), the disk, or the ACB can also wear down. This wear can contribute to leakage / buildup, and some friction in the operation.

Make sure the actuating arm slot and screw are cleaned intermittently--fine powder, as editingfx noted with AA#5, helps gum things up.

Finally, clean the PTED as well, particularly if you've been using it awhile.

Jim H.

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