close
Long Range Hunting Online Magazine


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

Rifles, Bullets, Barrels & Ballistics Applied Ballistics

Reply

300-378 Wby factory ammo, blown primer stuck bolt

LinkBack Thread Tools Display Modes
  #1  
Unread 08-03-2012, 07:38 PM
dig dig is offline
Gold Member
 
Join Date: Sep 2010
Location: Arizona
Posts: 662
300-378 Wby factory ammo, blown primer stuck bolt

At the range today sighting in a friends 300-378 Weatherby Mag. It's a stock Mark 5 action and stock, no custom work. Using Weatherby Factory ammo 180 grn Nosler AB. First shot bolt is stiff, like pry on it stiff. Second shot bolt stuck, I open up with mallet and primer is blown, both show major extractor marks. Rifle is in great shape barrel is clean, no obstructions etc. . . Needless to say I am done shooting it. Ammo is about 4 years old I am told, temp was hot 105 but ammo not left in sun, came out of truck. What are he possible issues, yes I will have it looked at of course.
__________________
Digger
Reply With Quote
  •   #2  
    Unread 08-03-2012, 11:04 PM
    Official LRH Sponsor
     
    Join Date: Jun 2004
    Location: Fort Shaw, Montana
    Posts: 6,847
    Re: 300-378 Wby factory ammo, blown primer stuck bolt

    Get some fresh ammo and try it again. Make sure you wear protection. If it happens again, send the rifle to Wby and let them fix the problem. Likely the ammo may have been allowed to heat and cool, heat and cool over the past 4 years. This can cause the powder to start degrading which speeds up the powders burn rate.

    Also, if the ammo was bouncing around in a truck for some amount of time, this vibration can also cause the powder to break down and burn rate to increase causing pressure spikes.

    First thing to do, get fresh ammo and see what the rifle does.
    __________________
    Kirby Allen(50)

    Allen Precision Shooting
    Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

    Farther, Faster and Flatter then ever before.

    Web Page: www.apsrifles.com

    allenmagnum@gmail.com
    Reply With Quote

      #3  
    Unread 08-03-2012, 11:53 PM
    dig dig is offline
    Gold Member
     
    Join Date: Sep 2010
    Location: Arizona
    Posts: 662
    Re: 300-378 Wby factory ammo, blown primer stuck bolt

    Thank you, that was along my thoughts, ammo ridding in the vehicle for several years in this az heat breaking down. I always wear glasses at the bench this just reinforced it scary! One other thought could there be a bend in the barrel? Neither shot hit 2' x 3' piece of paper at 100, I checked with a crude down the tube bore sighting prior to pulling trigger. Looked high, ran through the chrono at 3590' which seams very hot from a stock tube. He is buying fresh factory ammo to try prior to me starting to load.
    __________________
    Digger
    Reply With Quote
      #4  
    Unread 08-04-2012, 01:01 AM
    Platinum Member
     
    Join Date: May 2012
    Posts: 4,139
    Re: 300-378 Wby factory ammo, blown primer stuck bolt

    Quote:
    Originally Posted by dig View Post
    Thank you, that was along my thoughts, ammo ridding in the vehicle for several years in this az heat breaking down. I always wear glasses at the bench this just reinforced it scary! One other thought could there be a bend in the barrel? Neither shot hit 2' x 3' piece of paper at 100, I checked with a crude down the tube bore sighting prior to pulling trigger. Looked high, ran through the chrono at 3590' which seams very hot from a stock tube. He is buying fresh factory ammo to try prior to me starting to load.
    3590-- I've shot along side guys with that round and they struggled to get 3400 fps with a 180 in an accumark. Yep, it's a bit hot indeed.
    Reply With Quote
      #5  
    Unread 08-04-2012, 11:14 AM
    Official LRH Sponsor
     
    Join Date: Jun 2004
    Location: Fort Shaw, Montana
    Posts: 6,847
    Re: 300-378 Wby factory ammo, blown primer stuck bolt

    A bent barrel will do nothing to increase pressure as long as its not bent to the point that it STOPS the path of the bullet. IF that was the case, your barrel would look something like this >. A barrel that looks like ( will not cause any pressure spikes but getting point of impact and point of aim to match up may be a trick!!!

    That is VERY high velocity, get a new lot of brass and recheck.
    __________________
    Kirby Allen(50)

    Allen Precision Shooting
    Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

    Farther, Faster and Flatter then ever before.

    Web Page: www.apsrifles.com

    allenmagnum@gmail.com
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: 300-378 Wby factory ammo, blown primer stuck bolt
    Thread Thread Starter Forum Replies Last Post
    browning mk II bolt stuck open derrickrussell89 Gunsmithing 9 04-12-2012 10:19 AM
    .223 Cratered Primer Pockets with Factory ammo? jpbaker Rifles, Bullets, Barrels & Ballistics 12 01-11-2012 09:31 PM
    hornady factory ammo sticky when ejecting with bolt Wildhog Reloading 11 10-19-2010 08:51 PM
    Most Accurate Factory Rifle Factory Ammo Combo tgh97531 Rifles, Bullets, Barrels & Ballistics 4 01-08-2010 10:01 AM
    Factory Ammo Pierced Primer Brown Dog General Discussion 24 08-29-2007 04:53 PM


    All times are GMT -5. The time now is 12:49 AM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC