30-06 Springfield neck problem

[SebastianPL]

HI all.
During the cleaning proces of my 30-06 shells, I have noticed that some of them have strange irregularity on the surface of there necks. As you can see its not all around the neck but only on one of the sides. The marks are almost the same and they have almost equal "sizes".
The shells where reloaded first time, with Hornady dies. Measured and check with Wilson Shell check. This has occured on many of them, approx 25 out of 100pcs.
Strangely it happened only in one of my rifles.
On top picture, the problem is visible, on the next one you can see the same shells but turned a little.
Any advice is very much appreciated.

 

[Coyotefurharvester]

What are you shooting these in? What happened to the shoulders, let alone the necks?

 

[SeabeeKen]

Extremely rusted or dirty chamber would be my first thought. Can you bore scope the neck of the chamber?

 

[SebastianPL]

Extremely rusted or dirty chamber would be my first thought. Can you bore scope the neck of the chamber?

I have an provesional scope at work, I'll try to use it byt.... hm not so easy.

 

[SebastianPL]

Extremely rusted or dirty chamber would be my first thought. Can you bore scope the neck of the chamber?

It can be. It's an old mauser 2000. Don't think no one ever clean it properly ;-) ...... just borrowed it for range because it has huge suppressor instilled. Groups where not so bad at 100m. Normally I hunt with Haenel Jaeger 10, no problem there.

 

[SebastianPL]

What are you shooting these in? What happened to the shoulders, let alone the necks?

What do you mean?

 

[snert]

I think Coyotefurharvestor is seeing the reflection of something on the necks in the photos....when I first looked I thought the necks had indentations on them but upon review I think I am seeing a reflection of light in the photograph.

I think the neck issue is caused by a clump of rust in the neck portion of the chamber

 

[K22]

Many shooters I know do not bother cleaning the chamber, throat area, or lug recesses of their rifles and sometimes problems start to appear after extended use without cleaning these areas.

While I've never seen necks that badly deformed, clearly this is attributed to the rifle since you have not observed this in other cases used in other rifles.

Until you sort thought this, I would NOT run those case into my sizing die since I might scratch it. This is one situation when a score would be of great value to examine the chamber and throat area. If it is the chamber / throat area, the rifle might be salvageable by polishing the affected area. Personally, I would use a smith to do it, however.

You may also want to clean your die just to make sure nothing was deposited from the deformed cases since the second photo, first cases, seems to show the start of some case damage.

 

[Bill K]

It would appear some debris, not matter how small, is in the chamber and leaving a impression on the brass when fired.

 

[Coyotefurharvester]

I haven't seen a commercial 3006 cartridge with that shoulder/ neck shape, either after sizing or out of a chamber. Figured it had to be some sort of old military firearm.

 

[PhilC]

I haven't seen a commercial 3006 cartridge with that shoulder/ neck shape, either after sizing or out of a chamber. Figured it had to be some sort of old military firearm.

Agreed, the shoulders didn't appear to be fireformed after shooting, but who knows what the chamber is like on that old Masuer. A Teslong bore scope would tell an interesting story.

 

[Bill K]

Are the shoulders really a issue, or is it the lighting and angle of the photo taken of them ?

 

[Old Navy]

Time for spring cleaning that shooter.