Damage To Rifle Brass Neck And Shoulder

S

SirNine

Inactive
I just resized my first batch of 300 black out brass and notices this damage to the neck and shoulder.

EzQgGwn

Es6qKkK

(link to images http://imgur.com/a/aE7Fh)

I noticed a few small dings before resizing but certainly not that bad. These look like deep scratches not completely through.

Head stamps are FC, PPU and S&B. this was all factory new ammo. i can see no dibrie in my sizing die. Cleaned the dies with alcohol and q-tips about a week before this brass was processed. Brass was not tumbled before being resized

As always any thoughts or input would be greatly appreciated.

Side note a lot of my 223 brass has very similar damage.
 
The dings and dents just show that your rifle and ammunition are normal. About all ejected brass from semi-autos, especially rifles, will have various dents, mostly on the necks, due to the violent ejection. Resizing will restore the cosmetics until next time.
 
I just resized my first batch of 300 black out brass and notices this damage to the neck and shoulder.
Click to expand...

I will not assume you fired these cases because you said you just resized them. If I had shoulders and necks that looked like that I would cut back on the lube. Before firing I would clean the chamber, I do not want anything between the chamber and case but air.

F. Guffey
 
You say that you didn't tumble the brass before sizing... how much residue was on the brass from being thrown on the ground and how much powder residue and carbon was on the necks?
I don't run dirty brass through my dies because it will not only scratch the brass but it will also scratch the dies eventually. I always tumble my brass before sizing.
 
"...caused by the "violent" ejection..." Yep, but it's from the case getting bashed on the receiver on the way out. Nothing to worry about just the same. Neither are dents on the case mouth. Caused by the same thing and fixed with needle nosed pliers(just enough for the expander button to fit) before sizing.
 
Thank you all for the responses, makes me feel a lot better.

how much residue was on the brass from being thrown on the ground and how much powder residue and carbon was on the necks?
Click to expand...
Not much at all. a little dirt on the cases wiped it off and tapped the cases on my desk to get any dirt out. inside of the cases are darkish with carbon still has a darker brass color. I plan on getting a tumbler and a lee universal decapping die in the coming weeks.

I will not assume you fired these cases because you said you just resized them
Click to expand...
These where fired through my gun. I plan on just running all my cases through my small base die till I get comfortable and get the hang of things. I'm running all semi auto anyways
 
An AK leaves a mark about mid way on the case body. We call it an "AK Kiss". Nothing to worry about. At the next firing, the dent blows out, but then a new one is quickly formed at ejection.
 
I just resized my first batch of 300 black out brass and notices this damage to the neck and shoulder.
Click to expand...

If he fired the cases and then noticed the neck and shoulders he should consider there is a problem with the ejection of the case. He started with finding problems after sizing.

F. Guffey
 
Shouldn't the resizing operation have ironed out those dents already? I wouldn't mind if the brass are just fired. After resizing? It doesn't look right.

-TL

Sent from my SM-G930T using Tapatalk
 
I noticed a few small dings before resizing but certainly not that bad. These look like deep scratches not completely through.
Click to expand...
So the cases looked better before resizing than after resizing. Should that be the case the added dings or dents came as a result of resizing. With good clean dies I have seen this sort of issue with as Mr. F. Guffy mentions, excessive lube. Small dents will blow out on the next firing and I would not overly worry about it.

Ron
 
They don't really have to many dent but 90% of the cases have pretty deep scratches on the neck and shoulder. The scratches in the cases became worse after resizing.
 
Scratches found AFTER sizing indicate debris embedded inside the sizing die. Possibly a fatal flaw in the sizer or some stuff deposited during sizing of dirty cases.

In my experience, the 300AAC is not that violent during ejection but the cases are more subject to dinging of the mouth than .223. If the scratches appear during firing, you may have a chamber issue.
 
You must log in or register to reply here.
Back
Top