Dillon 550 primer seating

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ReloaderRick

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I'm having trouble with large pistol primers binding when seating. Not sure if it's the Dominion primers or the seating stem. I have to reseat most primers with a hand tool. Any suggestions?
 
is it the primers not feeding properly or the primers not being seated deep enough?

i seem to recall in the many threads on dominion primers that you should lightly sand the primer tubes to make them a tiny bit larger for better feeding.
 
Usually I do two strokes for primer, one just to put it into the pocket for initial seating, second for actual seating. Not all primers look pretty, periodically I have some brass shaved. To be save I put these cases in question into separate box for slow fire shooting. However, never had any issues, they always went bung.
Bring some ammo that you have worried about to the range and give it a try.
 
Spawn-Inc said:
i seem to recall in the many threads on dominion primers that you should lightly sand the primer tubes to make them a tiny bit larger for better feeding.
Click to expand...

My experience is that the large pistol primers are fine, but the large rifle primers required polishing inside the feed tube to feed.

Assuming that you are not using brass with a crimped primer pocket, the usual reason for difficult primer seating on a Dillon 550 is that the little spring at station 1 is not properly adjusted to hold the case in place on the shellplate. If the primer pocket is not properly aligned with the seating punch, it will cause difficult seating and damaged primers.
 
I had a similar issue with my 650 last year. I found that the entire "turret" assembly (which is secured by 2 allen head machine screws located below the shellplate) had come loose. Snugged them up--problem solved. Not sure if the 550 is a similar set up.
 
tjhaile said:
My experience is that the large pistol primers are fine, but the large rifle primers required polishing inside the feed tube to feed.

Assuming that you are not using brass with a crimped primer pocket, the usual reason for difficult primer seating on a Dillon 550 is that the little spring at station 1 is not properly adjusted to hold the case in place on the shellplate. If the primer pocket is not properly aligned with the seating punch, it will cause difficult seating and damaged primers.
Click to expand...

Along with this, check the tension on your shell plate. I find with my 550 I keep it as tight as possible without binding. Too loose seems to cause misalignment in all stations.
 
Is that spring supposed to be touching the case?
tjhaile said:
My experience is that the large pistol primers are fine, but the large rifle primers required polishing inside the feed tube to feed.

Assuming that you are not using brass with a crimped primer pocket, the usual reason for difficult primer seating on a Dillon 550 is that the little spring at station 1 is not properly adjusted to hold the case in place on the shellplate. If the primer pocket is not properly aligned with the seating punch, it will cause difficult seating and damaged primers.
Click to expand...

Is that spring supposed to touch the case?
 
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