Primer size question

T

trickrick

New member
I bought a 100 rounds of new Winchester brass for my 223
I have been using CCI and Federal primers in the past due to them doing the best groups in other rifles.
I tried both of those brands in the small rifle primers and neither of them would seat into the primer pocket.
I picked up some winchesters to try and they went in better, but still seemed very tight and even had several (4 or 5 in a hundred) that would not seat.
I've never run into this, any ideas?
 
I have never had this happen unless I was using once fired military brass with a crimped primer..

I'd find some different brass and try that.. Could be a bad batch of brass..
 
Originally Posted By: trickrickI bought a 100 rounds of new Winchester brass for my 223
I have been using CCI and Federal primers in the past due to them doing the best groups in other rifles.
I tried both of those brands in the small rifle primers and neither of them would seat into the primer pocket.
I picked up some winchesters to try and they went in better, but still seemed very tight and even had several (4 or 5 in a hundred) that would not seat.
I've never run into this, any ideas?


What tool are you using to seat the primers?

Describe, "would not seat"

Winchester often has tight pockets.
 
What are you using to seat your primers, a hand held or bench mount. I've had brass that took a lot of pressure with my hand held primer seater.

Now if your using a bench press,and they won't seat then it's time to buy a primer pocket tool.

Will the ones that you can't seat even start to go in?

BTW if your using these in an AR or anything else with a floating firing pin, check and make sure they are deep enough that they won't slam fire, IE below flush.
 


223/5.56 loads in my AR I use #41 primers. They are hard primers.

I use an RCBS, I think it is called APS. I load primers in plastic strips.

Mount the tool on my bench plate and prime.

I have a Lee hand tool it is okay for soft brass and primers. I use it for my 38-55.
 
Thanks guys for all the responses so far.
I am using a lee bench primer tool. Never had a problem seating primers until this batch
This is brand new, unfired Winchester brass that I got from Gander Mountain.
The primers that didn't go in actual buggered up and I had to decap it to get them out. The edges peeled up and went in kinda off kilter?

Since I have them all primer now I will pay attention to the next priming process.
I think that the trash has been dumped so checking the batch number is out of the question.
 
I realize that we aren't dealing with military crimps here, but a primer pocket swager might form your pockets to the right size. I have not used a swager, I use a cutter to remove military crimps. In this case though it might work. Maybe some here can chime in, that use the swager.

Heres a link for a swager: SWAGER DIE
 


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