out of round neck????

[galold]

I just received my new custom built 6BR. I noticed something I have never seen before when I went to reload the spent brass. The hole at the end of the brass where the bullet comes out, is out of round. Alot of them are really obvious and oval. I am using Lapua brass. Some of them look like thy were hit with a light hammer tap. I have been reloading custom rifles for years and have never seen this. What is going on???

Thanks

 

[KevinThomas]

galold,

yes, minor dings and occasional out of roundness is quite common in new brass, both ours and any other manufacturer as well. This is the reason we strongly recommend running new brass either through a neck die or over an expander mandral before its initial loading. Just a question of ensuring that it's uniform in both roundness and neck tension for the first firing.

If, however, you have any that are so badly dinged or otherwise damaged that they can't be used, by all means, send them back and I'll be happy to replace them for you.

Nammo Inc.
Attn: Kevin Thomas
123 Winchester Dr.
Sedalia, MO
65301

ksthomas@lapua.us
660-826-3232

 

[galold]

I'm sorry, I didn't explain myself very well. The brass looks great going into the gun. It's after there fired that there out of round and have an almost flat side on some.
Thanks

 

[CatShooter]

I'm sorry, I didn't explain myself very well. The brass looks great going into the gun. It's after there fired that there out of round and have an almost flat side on some.
Thanks

It would help if you mentioned what rifle it is...

... but, the out of round "dings" come from the case being ejected from the bolt face by a spring loaded plunger - the plunger forces the case over to the right side (if it a "normal" rifle), and the case is slapped to the side and hitting the receiver wall... getting dinged.

I cut the ejector spring short on all of my rifles, so the cases fall just outside of the rifle so I don't have to chase them all over the place.

 

[jonbearman]

Or the chamber is out of round.I would get some cerrosafe and do a chamber cast to make sure it isnt out of round.

 

[bozo699]

Jon,
I would think if the chamber was out of round by much at all there would be catastrophic results, at the very least a lot of hot gasses blowing back in the face, I think he is dinging the mouths up on extraction? who knows let us know what you find galold.
Wayne.

 

[21shooter]

Hi, I would be talking to the builder (gunsmith). Thanks, John

 

[fdshuster]

galold: I know exactly what you're talking about, and yes it could be an out of round chamber neck. I had the same experience a lot of years ago with an old 03-A3 (war time production?). Cases went in perfectly round, after firing came out with a partial flat on one side. To check for the case being dented on extraction, open & pull back the bolt very gently and follow it on its way out of the receiver. You might also look for brass rub marks on the inside of the receiver. A problem with the extractor would be the easy fix, an out of round chamber neck opens a whole new can of worms, (with the person who cut the chamber). My fix was a barrel replacement. Keep us posted: interesting problem.

 

[Erik Cortina]

I'm with CatShooter. I use no springs in my ejector for the same reason.

 

[SS427]

I too think it is the ejector. If you have soft brass, it really shows up as a problem. But first, follow Frank's advice and make sure.

 

[markm87]

Yep. Just dropping an empty piece of brass on the floor will knock the mouth out of round.

So ejecting it at the range can definitely cause this.

 

[galold]

Gentlemen
Thank you for all your replies.
After talking with the well known smith, and running a few tests, I have found the problem. It is indeed denting the mouth of the cases upon ejection. The rifle is a 6 br repeter that sports a trued 700 action.
NOW...THE QUESTION IS..TO FIX..OR NOT.. Is this something I should live with? Or is a simple fix. If I could fix it myself I would like to, as I am handy, I am no gun smith by any means.
Any help would be appreciated....Thanks

 

[navyrad8r]

well...if you don't have to shoot as a repeater pull the ejector and spring. if you have to shoot as repeater, maybe use a weaker spring? intersting post please update with your decisions.
cheers,
doc

 

[bozo699]

I'm sorry, I didn't explain myself very well. The brass looks great going into the gun. It's after there fired that there out of round and have an almost flat side on some.
Thanks

It would help if you mentioned what rifle it is...

... but, the out of round "dings" come from the case being ejected from the bolt face by a spring loaded plunger - the plunger forces the case over to the right side (if it a "normal" rifle), and the case is slapped to the side and hitting the receiver wall... getting dinged.

I cut the ejector spring short on all of my rifles, so the cases fall just outside of the rifle so I don't have to chase them all over the place.

I think catshooter has answered that for you, yes I believe you could do the work yourself, and I am glad it will be a simple fix instead of a chamber job. Best of luck let us know how it all works out for you.
Wayne.

 

[MrMajestic]

If, however, you have any that are so badly dinged or otherwise damaged that they can't be used, by all means, send them back and I'll be happy to replace them for you.

Great cases and customer service!

 

[lurcher]

You can get reduced power plunger springs here I haven't tried one but they look like they might be worth a try?

 

[CatShooter]

Gentlemen
Thank you for all your replies.
After talking with the well known smith, and running a few tests, I have found the problem. It is indeed denting the mouth of the cases upon ejection. The rifle is a 6 br repeter that sports a trued 700 action.
NOW...THE QUESTION IS..TO FIX..OR NOT.. Is this something I should live with? Or is a simple fix. If I could fix it myself I would like to, as I am handy, I am no gun smith by any means.
Any help would be appreciated....Thanks

I have done so many of these over the last 900 years that is automatic - I buy a Remington and I cut the spring.

Look at the bolt, you will see the pin that goes past the ejector plunger. Push that pin out with a drift pin (punch pin) and the plunger and spring will come out.

Cut the spring with a Dremel cut off wheel, so it is 0.95" long. Then put it back together in reverse order. (If you don't have the tools, go to a gunsmith and tell him to do what I said).

This will stop the dents, and drop the cases right next to your rifle when ejected.

Or, you can just remove the plunger and spring and leave it that way - a lot of folks do that too.

 

[galold]

Cat shooter..
Thanks...I will give it a try.

 

[galold]

After taking catshooters advice and shorting the ejector spring, the 6 BR is ejecting like a dream...
NO MORE OUT OF ROUND NECKS......

Thanks to all, and thanks for such a great web site!!!