Mdreyer58
Mdreyer58
5 posts
Joined February 2017

Primers not seating to within spec

Just set up my brand new 550B. Successfully set all the Dillon dies for 9mm. Started loading. Initially did about 10-15 rounds, then did a quality check. First thing noticed was that the primers were seated to .000 to 001 at best.

Checking the manual it shows a dim range for the primer seating plunger on the primer bar to within 2.215 to 2.220". I disassembled and checked mine. It is at 2.213". Seems like this is the problem, but there does not seem to be a way to make adjustments. Am I missing something??

Btw, are the rounds I've loaded with the shallow primers safe to shoot? (Glocks)
EXNAVYEOD
EXNAVYEOD
2 posts
Joined September 2012

RE: Primers not seating to within spec

Hey congrats on your new Dillon, you'll enjoy it. My wife calls mine the, "Blue Idol". Primer are not always the same size, so there might be just a little divot where the primer is. That is ok, if its not completely setting the primer it is an issue.
Mdreyer58
Mdreyer58
5 posts
Joined February 2017

RE: Primers not seating to within spec

UPDATE:

I have verified that the lever stroke is not impeded anything, including the separate cartridge chute or the 2 screws that attach the spent primer dispenser. I have meticulously adjusted the shell plate for excess play, testing it between position 2 and 3. HOWEVER - the shell plate does seem to bind at one point when rotating. Example: as I rotate the shell plate, checking for play between position 2 and 3, the play varies each time... One will be barely perceptible, the next, slightly more, then another one zero. If I attempt to tighten the bolt ever so slightly, the portion of the shell plate with no play then binds. Obviously, one of the 2 mating face of the shell plate and shel plate platform is not flat.

After removing as much play as possible from the shell plate, I attempted to seat another primer. Result = 0.000 flush. Grrrr.....
Mdreyer58
Mdreyer58
5 posts
Joined February 2017

RE: Primers not seating to within spec

One more thing : I attempt to adjust the height of the primer cup assy on the small primer slide bar by adjusting the set screw that retains it. No change.
Mdreyer58
Mdreyer58
5 posts
Joined February 2017

RE: Primers not seating to within spec

Called Dillon Tech Support.....on a Saturday. wow.

She understood the issue and provided the actions to fix.

Cudo's to Dillon's impressive Customer Service!
adrieln
adrieln
1 post
Joined August 2016

RE: Primers not seating to within spec

What was the fix that was suggested?
Mdreyer58
Mdreyer58
5 posts
Joined February 2017

RE: Primers not seating to within spec

I was given guidance on tweaking the height of the primer cup on the small primer slide bar. With a spent primer in the cup, place assembly in a pair of vice grips,loosen the set screw and readjust the dimension to spec and retighten.
john689089
john689089
3 posts
Joined July 2017

RE: Primers not seating to within spec

I am experiencing the exact same problem with primers only seating to .000 flush. Went thru the same procedures for tightening the shell plate and checking for obstructions/loose screws under the shell plate. My primer cup-to-bottom of primer bar dimension is 1.210". The instruction manual says this dimension should be 1.215-1.220". I've tried to adjust the primer cup/ram by loosening the set screw and adjusting the height, but the reduced diameter of the ram where the set screw contacts it forces it back to 1.210" when tightening the set screw.
Dillon, do you have a fix for this? Your Knowledge Base says the same thing that all loading manuals say about recessing the primer .002-.005".
jacobo
jacobo
4 posts
Joined August 2015

RE: Primers not seating to within spec

Hi there,

I am also having issues with primers not seating flushed. I have no obstructions, no loose screws (under the platform), and a tight (and right side up) shell plate. Like the previous poster, my primer "cup-to-bottom of primer bar" dimension is below spec: 1.205". Like he stated, when adjusting the above-mentioned dimension to spec, mine goes back to 1.205 when re-tightening. I suspect that this is because the set screw of the primer bar is pretty thick and the recessed aspect of the primer ram is limited. Thus, when re-tightening, the screw has no choice but to find its way back into the recessed aspect of the primer ram.

Any help on this matter will be greatly appreciated.
dillon
Administrator
dillon
3,222 posts
Joined July 2007

RE: Primers not seating to within spec

Please email us and request a new primer slide. Please remind us which machine you have, the primer size you need it for, and your mailing address.
john689089
john689089
3 posts
Joined July 2017

RE: Primers not seating to within spec

Is this replacement primer slide going to be within the specs, i.e. Cup height 1.215-1.220"?