Gunsmithing Case extracting creating a flat side on the case neck?

[kumaichi]

Hi All,

I sent my action out to get trued and rebarreled. I also had them install a new PTG bolt. So I get the rifle back and start shooting it and this is when I noticed that the case necks all have a flat side bent into them. I send an email off to the gunsmith and this is his reply:

"It looks as if your getting a hard extraction which is pretty normal for the Remington type actions. Since you opted to replace the bolt with the PTG which has the M16 extractor, your getting superb extraction which is pulling the case along the inside lug recess of the ejection port.

Also you have the case 'pinging' the action at the rear of the ejection port. All these issues will be resolved once you full length re-size your brass. Let me know if you have any more questions."

A couple of things to note here. When the cases eject, they don't go flying, on the contrary, they kind of just fall out of the action and land pretty much right under the rifle. The other thing is, this was new SW Ammo I was shooting with the Lapua cases. I sent a reply back to the gunsmith confirming that if I full length resize the brass it will make the issue go away. I have yet to hear anything back. Granted, I'm no gunsmith but I don't see how full length sizing the brass is going to resolve an issue where the case necks are getting bent. I've attached a couple of pictures of the case necks.

Does anyone have any suggestions? Would the problem really go away with full sizing the brass?

Thanks for your time and suggestions.

 

[Frostbite]

The same thing happens with my stock Remington 700 it also happens on occasion with my Savage. The ejector is pushing the brass into the inside of the action causing the dents. From my experience it is completely normal. Full length sizing will remove these dents. I have removed worse when resizing.

 

[D Miller]

Keep on shooting.

Necks will be fine after resizing, noting I would worry about.

 

[ugsly]

I get the same thing, I have had them hit my scope ring on the way out and ding them also.

Kc

 

[seanh]

Could be that the ejector pocket needs to be cleaned out. If that's OK you can reduce the ejector spring pressure and you won't get that.
Remington M-700 Ejector Spring Kit

Holland's Deluxe Trigger Spring Kit Remington 700 Short Action


I've simply cut a couple coils off and stretched the spring back to the original length...not the best way to go about it but it works.

 

[kumaichi]

Thanks so much guys! I've never had a bolt action rifle do this before so I was kind of freaking out. From everyones input, seems like it's a pretty common situation .

 

[JC PAINT WORKZ]

the Smith was stating everything will be fine once you resize the brass not meaning its going to stop denting the cases. Same thing happens with AR with deflector tab, But you can put some velcro or rubber on the AR's and it will soften the blow when the brass hits stopping the dents. Once you run it through a die it will form the brass back to normal. But it will not stop the problem