Lapua Brass and Primers

[Ned Ludd]

If the primers pockets weren't deep enough, as the OP originally stated, having a pocket uniforming tool that fails to touch the bottom is not going to reveal it. Regardless, I uniform .223 Rem primer pockets and have never had the additional/different problem you're describing either. I guess you two have just been unfortunate enough to get all the bad Lots of Lapua brass, leaving all the good ones for the rest of us. I appreciate that. I'd suggest that a call to Lapua might be more beneficial to resolving the issue than a post on a shooting forum.

 

[Liven The Dream]

I say times change and so do Products.
Just received 400 Lapua 6.5X284 Cases to re-size to .284. All Same Lot.

The Bur's in the Flash Holes Stand out like crossing gates ?
Just a little more Prep work

I also for the record just received 400 Peterson .308 SP Cases. They are like Gold Box for days Past.

 

[Nick Caprinolo]

Well I must have received a bad batch. I measured the neck and found the thickness varied by as much as 2.5 thousands. I have two hundred more from a different run, and they were closer to 1.5 thousands difference.

Since I built this rifle to use for benchrest, I guess I am now going to be turning cases. I will have to take them all down to .0125 in order to make them all the same. It's little wonder that some of the cases require more force to seat the bullets than others.

 

[swadiver]

i just found this same issue with new Lapua .222 brass. some primers (federal 205M's) not even flush with primer pocket. got out the uniformer.

 

[rwj]

i just found this same issue with new Lapua .222 brass. some primers (federal 205M's) not even flush with primer pocket. got out the uniformer.

Did you measure the depth of the primer pockets on the cases where the primers were not flush?

 

[swadiver]

no i did not. don't have the tool to do this

 

[Bc'z]

no i did not. don't have the tool to do this

Da lil rod dat slides on your calipers

 

[Bc'z]

So I measured some uncleaned pockets.
I trimming. 0005 out of the corner of pockets for a UNIFORM seating depth.

 

[VaniB]

Same problem for Lapua 221 Fireball brass for me with different lots of Remington 7.5 primers. CCi was not as bad, but a problem too. Only WSR primers would not protrude. Each individual case took a LOT OF UNIFORMING or primer took a lot of ramming. I NEVER experienced this with one single box of 100 cases in my 40 years of handloading .

 

[swadiver]

View attachment 1144555
Da lil rod dat slides on your calipersView attachment 1144556

so thats how it's done.

 

[Bc'z]

so thats how it's done.

It's the only tool I have that'll fit in that hole.
A guy has to work with what he has.
Even my cheapo calipers have the ability to measure pockets.

 

[mikeeg02]

View attachment 1144557
So I measured some uncleaned pockets.
I trimming. 0005 out of the corner of pockets for a UNIFORM seating depth.

I think thats a lyman uniformer?

I've found the sinclair ppc/br carbide uniformer cuts just a hair deeper than the lyman does, and keeps mine looking like this. Now that I see it zoomed in, it looks worse than it does. I have also found it better not to do anything to them until they have been once fired.

This is some old test brass I have, lord only knows how many firings on it.

 

[Bc'z]

I think thats a lyman uniformer?

I've found the sinclair ppc/br carbide uniformer cuts just a hair deeper than the lyman does, and keeps mine looking like this. Now that I see it zoomed in, it looks worse than it does. I have also found it better not to do anything to them until they have been once fired.

This is some old test brass I have, lord only knows how many firings on it.

View attachment 1144576

Yes it's a Lyman.
I checked pockets when new, no cutting of pockets was apparent.
2nd and 3rd firings showed a light clean up in the corners.

 

[Fotheringill]

Never had a problem with CCI and Lapua in 223 until Sunday when I had two that were struck and then nothing happened. This is after a good 6000 good rounds. Of course, I went home, pulled the bullet and found no powder in the two cases. I was embarrassed.

 

[rwj]

Never had a problem with CCI and Lapua in 223 until Sunday when I had two that were struck and then nothing happened. This is after a good 6000 good rounds. Of course, I went home, pulled the bullet and found no powder in the two cases. I was embarrassed.

The primers ignited and the bullets remained in the case?

 

[foxguy]

Yes it's a Lyman.
I checked pockets when new, no cutting of pockets was apparent.
2nd and 3rd firings showed a light clean up in the corners.

How deep is it cutting your Pockets?

I have a Sinclair model that cuts to a .125 depth.

 

[Bc'z]

How deep is it cutting your Pockets?

I have a Sinclair model that cuts to a .125 depth.

.120

 

[Fotheringill]

The primers ignited and the bullets remained in the case?

Looked like that. The inside of one case had fouling residue and the other was clean. Bullets stayed where they were and didn't move. I measured both before pulling for base to ogive. No change. I was also puzzled.

 

[Mark W]

Looked like that. The inside of one case had fouling residue and the other was clean. Bullets stayed where they were and didn't move. I measured both before pulling for base to ogive. No change. I was also puzzled.

I’ve done that a few times with different cartridges and never had a primer alone move the bullet. I’ve read on the internet that it will, but it’s not been my experience.

 

[Liven The Dream]

K&M makes a nice Pocket Cutter/ Clean up
That worked with a Battery Drill