Powder rings around Case Neck?

[Shooter_308]

Hey guys, i've been shooting 1-2 times a week now since i bought my R700 back in december, so i've gone through a fair amount of ammo over the last couple months. Since then i've been collecting my brass in hopes of one day finally reloading. Well, i'm on my third batch of 200 rounds (i buy by the case from my dealer) and o far the first two were great, clean and consistent. Lately I noticed the last few times when putting my spent brass into the storage box that almost every casing (except for a few here and there) all have burnt powder marks around the neck of the casing like so:

sorry for the crappy quality pics but you should be able to get the idea...is this something i should worry about or is this a normal occurance? Maybe i just never noticed the powder marks from other batches? I've heard this is a case of low pressure, and rounds not properly fire-forming because of it? Just looking for some insight.

Thanks

 

[Paladin2147]

Re: Powder rings around Case Neck?

There are a number of things that could cause it. But its no big deal. Your good, no worry. Was this only from the last batch? Same brand etc.?

 

[Shooter_308]

Re: Powder rings around Case Neck?

Yea this was all same batch, packed in a sealed box. I only went through 2 boxes so far. I'll see if the problem keeps up. I didn't notice any performance issues at least

 

[Paladin2147]

Re: Powder rings around Case Neck?

Well just for grins, you might really clean the throat area of the chamber. You may have some carbon built up. Us a cleaner specifically formulated to get the carbon.

 

[Unknown]

Re: Powder rings around Case Neck?

All of my rifles show some carbon rings like that. I had been told that the rings are where the case finally seals up from the pressure of the round. The closer to the case mouth, and more uniform the ring is the better it is...so I'm told.

As all my rifles show some carbon ring of various types, I figured it was a normal part of the case sealing against the pressure.

 

[pjparker]

Re: Powder rings around Case Neck?

+1 for Unknown's reply.

Consider in a non-issue. All mine do it to some extent, some much more.

It is an obturation issue, and to expect the entire length of the case neck to completely seal with the internal rising pressure is apparently unrealistic.

Paul

 

[Shooter_308]

Re: Powder rings around Case Neck?

thanks guys, went shooting today and really didn't notice anything out of the ordinary. Just being paranoid i guess haha.

 

[red hawk]

Re: Powder rings around Case Neck?

+2 for unknown's reply.

 

[Highflyer]

Re: Powder rings around Case Neck?

+3

 

[Unknown]

Re: Powder rings around Case Neck?

Geez, it is nice to get to be correct sometimes. I'll have to show this to my wife....

 

[Shooter_308]

Re: Powder rings around Case Neck?

Nope, she'll still find something wrong. They always do haha!

Thanks for the input guys, i really appreciate it!

 

[Unknown]

Re: Powder rings around Case Neck?

I know.... I was wrong for posting that comment....