Skip to content Skip to footer
Please to create posts and topics.

Primers won't seat

I can see the small primer in the cup on stage 2. It does not seat at all. At stage 3, the primer is not in the case and is still sitting in the cup at stage 2. I can't feel hardly any pressure when pulling on the arm at stage 2.

One Dillion tech said it was bad brass, but the Winchester primers won't seat in new Winchester brass either. I just switched calibers from .45 Long Colt to .38 Special, but I have a dedicated .38 Special priming system, and I changed the shell plates to #2.

What is out of adjustment?

 I assume you are pushing forward on the handle at the end of the upstroke to seat the primer. Do you have #2 locator pins installed?

Without brass in the shellplate, if you push forward on the handle does the primer come up?

Yes, I am pushing up on the handle, but I don't feel much resistance, which I did when the .45 Long Colt large primers were being seated.  Yes, the locator button is in place at station #2. And yes, the primer is feeding down into the cup and is in place without brass at station #2.

For a few strokes this seemed to be an intermittent problem, but now it is consistent that the primers don't seat. I tried three pieces of new Winchester brass and no Winchester primer went into the brass so it is definitely not a "cheap brass" problem with the primer pocket.

Thanks for any suggestions you can offer.

Did you ever figure this out?  Seems to me that the primer seating pin set screw might be loose and not putting any pressure on the primer to seat it... simply allowing the brass to push it down and then it pops back into place. 

2018 I am having the same problems with Winchester primers into Winchester brass. Hard to push in and some don't seat all the way. No problems with any other type of brass.

how high do the primers protrude? Is there a circle stamped around the primer cup? If unsure, please send some photos to sales@dillonprecision.com

By Reloaders, For Reloaders.

Reloader.com © 2026. All rights reserved.

Go to Top
E-mail
Password
Confirm Password