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

7WSM and long action ?

LinkBack Thread Tools Display Modes
  #1  
Unread 12-23-2007, 11:49 AM
Silver Member
 
Join Date: Mar 2006
Location: Alberta
Posts: 155
7WSM and long action ?

I am considering building a 7WSM specifically around the 162 A-MAX (.625 BC) or Berger 168 VLD (.643 BC) and 1-10 twist barrel.

I want to maximize the powder capacity (and velocity) of the case, so the plan is a cartridge overall length based on these bullets seated to a maximum .284" into the case neck (or less - what is the minimum I can get away with ??). I will also have the barrel/chamber throated so that the bullets would touch the lands when seated to this cartridge COL.

Lastly, I do want to use the magazine of the rifle. I suspect I cannot use the magazine on a short action with this proposed COL (whatever that may be - not sure at this point - anyone ??). Therefore, I am considering custom chambering a new long action SPS or Savage 110 (in 300 RUM as a donor action?) to this cartridge spec.

Any problems I may be getting into with this build ? Can I expect much of an improvement in performance over a short action with these bullets seated to 2.86" COL ? Any advice or thoughts would be appreciated.
Reply With Quote
  •   #2  
    Unread 12-23-2007, 11:56 AM
    dwm dwm is offline
    Gold Member
     
    Join Date: Feb 2003
    Location: Texas
    Posts: 736
    The detachable magazine length of the short action Savage model 16FCSS is 3".
    __________________
    doug
    Reply With Quote

      #3  
    Unread 12-23-2007, 12:37 PM
    Silver Member
     
    Join Date: Mar 2006
    Location: Alberta
    Posts: 155
    I am 'estimating' the COL with the 162 A-max seated -.284" into the case neck to have a COL of around 3.5".
    Reply With Quote
      #4  
    Unread 12-23-2007, 09:43 PM
    Bronze Member
     
    Join Date: Mar 2006
    Location: California
    Posts: 94
    I have a custom 7wsm built by Chris Mathhews on a Stiller Predator short action with a watts extended magazine.My O.A.L. to the lands is 2.974 with the amax.This combo works with a little room to spare in the Watts box.

    If you measure from the start of the boattail up .284(which the min. i like to have)you get a O.A.L. of about 3.029.I don't were you got the 3.5.

    My 7 shot the amaxs ok but it liked the 175mk and the 176 Cauterucio the best.
    __________________
    Blacktail2
    Reply With Quote
      #5  
    Unread 12-23-2007, 10:28 PM
    Silver Member
     
    Join Date: Mar 2006
    Location: Alberta
    Posts: 155
    Quote:
    Originally Posted by Blacktail2 View Post
    My O.A.L. to the lands is 2.974 with the amax.This combo works with a little room to spare in the Watts box.

    If you measure from the start of the boattail up .284(which the min. i like to have)you get a O.A.L. of about 3.029.I don't were you got the 3.5.
    The 3.5" may be a bad estimate. I won't argue 3.029" - thank-you. What is the OAL with the 175 SMK's ?
    Reply With Quote
      #6  
    Unread 12-23-2007, 11:24 PM
    dwm dwm is offline
    Gold Member
     
    Join Date: Feb 2003
    Location: Texas
    Posts: 736
    Now we are getting somewhere. Would a 3" detachable mag be ok then with the proper throat?

    Would this be close enough, does one really need a long action?

    Then what about the 168 Berger and maybe even the 180 Berger? (I'm kind of hijacking your thread, but it is to the same question ...)
    __________________
    doug
    Reply With Quote
      #7  
    Unread 12-23-2007, 11:24 PM
    Bronze Member
     
    Join Date: Mar 2006
    Location: California
    Posts: 94
    Kissing the lands lightly 2.965 loa. The base to ogive(which is a better measurement) is 2.311 with the 175MK.
    __________________
    Blacktail2
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: 7WSM and long action ?
    Thread Thread Starter Forum Replies Last Post
    Want to see your long action 7wsm loads rfurman24 Reloading 9 09-04-2011 10:44 PM
    Long Action 7WSM or RSAUM Repeater blygy Rifles, Bullets, Barrels & Ballistics 1 03-01-2011 04:35 PM
    7WSM...long action or short action? hmbleservant Rifles, Bullets, Barrels & Ballistics 2 12-09-2010 01:30 AM
    Savage Long Action - 7WSM? TORCHRIDER Rifles, Bullets, Barrels & Ballistics 0 11-02-2010 10:43 PM
    Which action for a 7wsm? OKbow87 Gunsmithing 6 11-11-2007 12:07 PM


    All times are GMT -5. The time now is 03:04 AM.


    Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC