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

Copper Buildup???

LinkBack Thread Tools Display Modes
  #1  
Unread 10-15-2013, 09:20 PM
Silver Member
 
Join Date: Jul 2012
Location: Texas
Posts: 123
Copper Buildup???

I've been shooting a lot in preparation for a hunt. Of the 2 rifles I have been shooting, a 7mm wsm and a 300 wsm, I have noticed that the 7mm seems to build up substantially more copper than the 300. Why is this? Is it a problem? What can I do about it?
Reply With Quote
  •   #2  
    Unread 10-16-2013, 01:50 AM
    Gold Member
     
    Join Date: Feb 2012
    Location: Boise, ID
    Posts: 997
    Re: Copper Buildup???

    Probably just the condition of the barrel. Imperfections in the barrel will snag copper, shot after shot. With factory barrels, it's a crap shoot with the condition of a barrel. Shooting and cleaning can sometimes make it better. Having a gunsmith hand lap and re-crown the barrel will also improve it. My experience is that if you've done a barrel break-in (shoot and clean), and it doesn't get better within the first 50 shots, it probably won't get much better.
    Reply With Quote

      #3  
    Unread 10-16-2013, 02:45 AM
    Gold Member
     
    Join Date: Apr 2013
    Location: Norway, Buskerud
    Posts: 576
    Re: Copper Buildup???

    Quote:
    Originally Posted by o2bwest View Post
    I've been shooting a lot in preparation for a hunt. Of the 2 rifles I have been shooting, a 7mm wsm and a 300 wsm, I have noticed that the 7mm seems to build up substantially more copper than the 300. Why is this? Is it a problem? What can I do about it?
    The increased copper fouling in your 7 WSM might have different kind of reasons.


    - - The kind of bullets you use. Iíve personally made the experience that some bullets give more fouling to a certain barrel than others. Especially interesting in this case are monos made of copper like the Barnes etc. They have a tendency to give more copper fouling than the usual ones. So change the type of bullet and check the results!
    - - Lighter bullets with higher speed may give more fouling. Coefficient of friction.
    - - Condition of your barrel? New or old? Have you carried out a reasonable break in of your 7 WSM?


    A little advice at the end. You should not compare two different rifles with two different calibres due to their characteristics! Thatís like a comparison of apples and pears. I hope youíll get the problem solved soon.
    Reply With Quote
      #4  
    Unread 10-16-2013, 10:10 AM
    Silver Member
     
    Join Date: Jul 2012
    Location: Texas
    Posts: 123
    Re: Copper Buildup???

    I'm shooting Accubonds. It was a used rifle when I got it. I have had it lapped and recrowned and I have around 150 rnds through it. It is shooting pretty well 1/2 moa at 100.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes



    All times are GMT -5. The time now is 11:35 PM.


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