Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

New barrel-problems ejecting 7mm Mag. cases

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-09-2012, 10:17 AM
Junior Member
 
Join Date: Apr 2008
Location: Worden, MT
Posts: 17
New barrel-problems ejecting 7mm Mag. cases

I recently had a new barrel put on a 7mm Rem. Mag. Previous reloaded ammunition was firing fine in the gun before I had the barrel change. Now, after firing the bolt will lift easy but I can't pull the bolt back to eject the cartridge. A couple taps with a plastic mallet and it will open. The gun is a late 70's model 700 ADL Remington.

The loaded cases measure .508 just above the belt before firing. The fired cases measure .515 after firing. They are expanding .007 according to my math.

Question: What is wrong? Head space to long? Bolt problems? Load too hot? (160 gr. Nosler Accubonds with 64.0 gr. H1000 seated 2.770" with Hornady Comparitor MV 2683 checked Sunday 10/7/12) I do not have the measurement to lands of the new chamber.

I would appreciate your earliest responses as unfortunately our hunting season is upon us and I may be gunless for an elk unless I get this problem fixed. Thanks, Rick
Reply With Quote
  #2  
Old 10-09-2012, 11:16 AM
Platinum Member
 
Join Date: Apr 2012
Location: The cold part of Montana
Posts: 1,390
Re: New barrel-problems ejecting 7mm Mag. cases

It sounds to me like you have a head space issue, I would be taking it back to the who ever installed the barrel along with the cases fired in that chamber and with some unloaded rounds. they'll likely have to cut off 1/2" or more to fix it if it is indeed head space. If that's the case I would also demand that they replace the barrel. That's a pretty mild load too.
__________________
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
Reply With Quote
  #3  
Old 10-10-2012, 10:40 AM
Junior Member
 
Join Date: Apr 2008
Location: Worden, MT
Posts: 17
Re: New barrel-problems ejecting 7mm Mag. cases

Thanks Joe,
Send some of your moisture south to us near Billings! I took the gun back to gunsmith last night and left it for him to look at. Asked him to call me before he puts too much into the situation. I tend to agree with your assumption that the head space is off somewhere. He told me he ran his Go-No Go and fired a round thru it before he gave it to me originally, and said it was good to go. Someone also told me .007" is not too much expansion on a 7mm fire case. others tell me it should be no more the .002-.003".
I was hoping for more responses but guess either everyone is hunting, digging sugar beets, or taking a wolf trapping class. I'll let you know what I find out in the next couple days.
Reply With Quote
  #4  
Old 10-10-2012, 01:07 PM
Platinum Member
 
Join Date: Apr 2012
Location: The cold part of Montana
Posts: 1,390
Re: New barrel-problems ejecting 7mm Mag. cases

Havre! moisture? lol. We only got enough to knock the dust down for a day or 2, it was good for the guys that got their winter wheat in though.
__________________
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
Reply With Quote
  #5  
Old 10-10-2012, 06:06 PM
Platinum Member
 
Join Date: Dec 2005
Location: Tucson Az
Posts: 1,336
Re: New barrel-problems ejecting 7mm Mag. cases

Is the expanded area in front of the bolt shinier than the rest of the case body? Is there any other area that is shiny? If so you may have an area in the chamber that is larger in diameter than the surrounding area of the chamber. When this happens the bolt lift is normal but it won't move to the rear. In some instances the chamber can be polished up and the issue is solved. Let us know so someone can help unravel the mystery.
Reply With Quote
  #6  
Old 10-10-2012, 08:07 PM
Platinum Member
 
Join Date: May 2012
Location: N.D.
Posts: 3,000
Re: New barrel-problems ejecting 7mm Mag. cases

Sometimes a belted round will have a slight burr right at the base of the body at the start of the belt. I've seen it on a ruger 7mag and a bit of oil and fine grit wet-or dry fixed it. I'd try new brass for now as the tail end isn't swelled at all yet and get your smith to touch up the chamber for you for free later.
Reply With Quote
  #7  
Old 10-10-2012, 08:42 PM
Gold Member
 
Join Date: Jul 2007
Location: Billings, Mt
Posts: 796
Re: New barrel-problems ejecting 7mm Mag. cases

Did you have it re-barreled here in Blgs?
Are you shooting reloads or factory?

If your smith did shoot it as he said and there was no problem then
it would lead me to think it was ammo related but it sure sounds like a head space or chamber problem to me.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: New barrel-problems ejecting 7mm Mag. cases
Thread Thread Starter Forum Replies Last Post
Ejecting issue sll Reloading 1 10-22-2011 05:36 PM
Savage edge .223 not ejecting Lexthepilot Rifles, Bullets, Barrels and Ballistics 2 12-08-2010 02:12 PM
hornady factory ammo sticky when ejecting with bolt Wildhog Reloading 11 10-19-2010 08:51 PM
accuracy problems with new barrel 14cm Rifles, Bullets, Barrels and Ballistics 10 01-19-2010 09:12 PM
Barrel Cleaning problems?? lerch Rifles, Bullets, Barrels and Ballistics 1 08-05-2005 11:17 PM


All times are GMT -5. The time now is 12:56 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC