Seating primers too deep???

RE: POST 23

Yes I use the Rockchucker single stage press, with the primer seater that is built into the press. it has tremendous force and torque and it is possible to over crush/flatten a primer, but they still seem to work fine. I have used several diff hand primers before and although faster I believe consistency is lost as the hands get tired and each hand squeeze is likely different. I've never had a primer pocket that was too deep, but suppose it's possible. that case should be tossed imo.
 
If you have an extra $100 lying around you could try the 21st century hand primer.S.S. Priming Tool I use it only for my .308 competition rounds. It has a micrometer adjustment. When the primer gets seated the 3 legs should have just a slight amount of pressure to "set" the primer for the strike. After firing there should be 3 marks(where the legs of the primer hit the pocket) in the burn mark inside the primer pocket. If the primer is too deep you will see a constant circle in the pocket. Too shallow & no or very faint 3 marks. Hope this helps Bob.

BW
 
I have never owned or seen any S&W revolver that had a problem firing primers that were seated "too deep." I am amazed at how reliable some of these match guns are with their light DA trigger pulls and crush fit Federal primers.

On the other hand, I once owned a Ruger GP-100 that would not fire deep primers. Transfer bar ignition seems to be more problematic with deep seated primers. You did mention that a Security Six was used in the mix.

Dave Sinko
 
I find it unlikely that you could be seating them too deep all of a sudden, since the majority of your ammo works correctly and it sounds like these dies used to not do this.

I've heard that primers are oil-sensitive, maybe some of them have been touched bare handed or contaminated in some other way?
 
David Sinko said:
I have never owned or seen any S&W revolver that had a problem firing primers that were seated "too deep." I am amazed at how reliable some of these match guns are with their light DA trigger pulls and crush fit Federal primers.

On the other hand, I once owned a Ruger GP-100 that would not fire deep primers. Transfer bar ignition seems to be more problematic with deep seated primers. You did mention that a Security Six was used in the mix.

Dave Sinko
Click to expand...

The Ruger was the gun that would shoot most of them while the 327 choked.
 
jmmitc06 said:
I find it unlikely that you could be seating them too deep all of a sudden, since the majority of your ammo works correctly and it sounds like these dies used to not do this.

I've heard that primers are oil-sensitive, maybe some of them have been touched bare handed or contaminated in some other way?
Click to expand...

I don't have to touch them for either unit bench or hand. The hand primer you just dump them in the tray and the bench unit you use pick up tubes. There isn't anything oily in either the hand primer's tray or the flip tray I use for the bench primer.
 
hangnoose said:
Yes I use the Rockchucker single stage press, with the primer seater that is built into the press. it has tremendous force and torque and it is possible to over crush/flatten a primer, but they still seem to work fine. I have used several diff hand primers before and although faster I believe consistency is lost as the hands get tired and each hand squeeze is likely different. I've never had a primer pocket that was too deep, but suppose it's possible. that case should be tossed imo.
Click to expand...

Thes are brand new Starline cases. And I have a thousand of them. Not going to be tossing anything. Might shoot them an email if the pockets do measure deep.
 
I keep forgetting that you're in Florida.

Have you checked your reloading time against the Tide Tables? Mebbee you're priming at low tide....

You're welcome.:D
 
NEW OR OLD BRASS

While I've never encountered it, I never really went out of my way to look for it either. Too deep is too deep. I suppose it's possible for a bad lot to be made. If they are ALL truly too deep, return them, don't toss them. the only light firing pin strikes I ever had was with a lightened trigger spring on a ruger redhawk & with cci primers only. I even sent a load of my handloads to Jack Wiegand, he checked them out and told me I wasn't seating them deep enough & flattening the primer cups, and recommended switching to federal primers. I did as instructed and had no more troubles.
 
primers must be seated to the bottom of the cup in the shell case but not so hard as to crush the primer.if seated to high the first strike of the firing pin will finish seating the primer and the second strike will fire the round. you must get a feel to know when the primer is at the bottom of the cup. that's why it's a good idea to use the same priming tool
as much as you can
 
Follow up and possible fix:

The bench mounted unit uses a screwed in part that is held by spring pressure for the cup. It seems the screwed in part had backed out a tiny bit enough to lengthen the rod section that pushes the primers. I guess it's just enough to seat them too deep but not deep enough that you see obvious damage. I screwed the thing back in tight and the problem is fixed. Thread locker will keep the thing in there for the future I hope. A couple of range tests have shown everything fires on the first shot no issues.

Now to keep trying to figure what the heck is wrong with the hand primer.
 
Shooting at a USPSA match I noted that some reloaded cartridges did not fire. These were loaded with Winchester WSP primers. I tried firing practice loads with CCI 300 primers and had about 5 per cent that did not fire. A friend who reloads for his 625 told me to use only Federal primers, because they are softer and ignite easier. For my next match used reloads with Federal 150 primers with no problems.
 
My question would be are you using pistol primers in rifle brass?
That is the only way I can see primers appearing to be seated to deep.
 
Humbolt Hostler said:
Shooting at a USPSA match I noted that some reloaded cartridges did not fire. These were loaded with Winchester WSP primers. I tried firing practice loads with CCI 300 primers and had about 5 per cent that did not fire. A friend who reloads for his 625 told me to use only Federal primers, because they are softer and ignite easier. For my next match used reloads with Federal 150 primers with no problems.
Click to expand...

You need to fix your gun.
 
I think its your brand of primers causing the problem.

Try some CCI or Winchester primers.
Good luck.
augy
 
Just a note:
Sometimes it is much better to read the entire thread, from the beginning, before posting help-thoughts-etc.
 
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