Discussion in 'Handloading and Reloading' started by Mark_Mark, Apr 19, 2021.
For gas guns, it is possible for residual gas pressure to push the primer out during extraction and cause a jam.
I think it's an experience thing...there are some that is loose enough that once you seat the primer, and then take the cartridge and tap the rim on a wooden surface...if it falls out, it's no good. I usually can feel the primer seating force. If it felt it went in too easily, I will do the tapping test. It is marked for last use even if it does not fall out.
“Too” loose is operative term here, yes? I look forward to answers to both questions although I’ve never experienced either circumstance.
I was thinking about tapping it on wood and see if it falls out. Didn’t know the physics behind primer pockets
There are a few companies that offed a go-no go gauge for test primer pockets. I just go by feel.
As others have said, a loose primer can etch your bolt face with hot gas, cause a jam and possibly break something in the trigger.
By feel when seating. I've tried a gauge and find it less useful than feeling seating.
In rifles: the first symptom is a gas leak around the primer than etches the bolt face. This is Not Good.
In pistols: gas leaking is possible, but I've never seen it, or a breach face etched by it.
My practice is to toss the bunch at that point. I do put up with some looseness as I load some light 9mm rounds for my granddaughter, but the cases are gone after that.
I've never seen a primer leak and don't want to.
I wouldn’t go that far.
If they haven’t fallen out yet, tap them. I’d just use them. I know I wouldn’t reprime them if I did take them down. Brass is cheap.
of of 400, 5-8 slipped in real easily. No worries???
If there are a few stray primers lying there, you found the problem cases.
I have only found loose pockets on some upper loaded 308 brass, and that was after several reloadings. Normally other things happen before loose pockets; split necks/bodies, damaged heads, case separation, etc...
Tap the base of each cartridge and then feel and see if any primers have protruded. If not, I would go forward with loading and firing the cartridges. In the future I would set aside anyone that feels loose in a separate bin to evaluate later.
Just something to ease your worries. Think about all those who load on a progressive press and miss loose primers (as one cannot feel them like a hand primer), myself included.
Boy that'd be a hard call. If they were 45auto, 38spec or even 9mm I'd prob shoot em and then toss the cases. Tossing 400 cases with a 2% failure rate might not go over too easy right now with brass being a bit more scarce. If it were 223 I'd prob go back through and separate the loose ones out (as much of a PITA as that sounds) as I really hate etched bolt faces.
Bottom line is if it stays in when fired, you got away with it.
Good system that makes logical sense.
If the primer is loose the biggest problem would be falling out and stopplng the firearm from functioning.
But more than likely I’d:
Drop them on a wooden cutting board or like surface a couple of times as mentioned previously.
Then use something like Markron Primer sealer for a little extra retention and be cognizant of this issue and cull the lose ones next time.
Lesson learned hopefully. I had this issue with Fed Brass in .327 FM on the 1st reload. Tossed 300-400 plus and will toss all the Fed brass once all are shot and stay with Starline exclusively for this caliber.
Example: Rem 7 1/2 are smaller than CCI #41 and Fed 205MAR. So all I have to do is switch mfg and your good to go. I normally mark the brass with a marker around the base to tell me it's requires a larger primer.
At $20 it's cheap insurance and has saved me way more than $20 in time prepping brass that was shot out. For the rounds that the OP mentioned, I'd tap the rim on a wooden block and discard (pull the bullets) on any rounds that displayed set-back. Then discard that brass, although often pricey, brass is still a consumable.
What a great addition to my bench!
Edit: Chuck R and I are obviously great minds!
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