Rem 700 Sendero caliber swap questions

Discussion in 'Long Range Hunting & Shooting' started by MudRunner2005, Jul 18, 2011.

  1. MudRunner2005

    MudRunner2005 Well-Known Member

    Messages:
    10,076
    Joined:
    Oct 13, 2008
    Hey folks, sorry I've been gone for a while, but I have a few questions about a gun I hope to be getting.

    The gun is a Remington 700 Sendero in .25-06 (long-action), with a Swarovski AV 4-12x50 on top.

    I have never owned a .25-06, and the rifling in the barrel looks to be a fair-bit worn down. The gun has been well shot (judging by looking at it, but the action still locks up tight as a tick's butt. The HS stock looks great, the bolt looks good, and the Swaro scope looks clear as crystal.

    Here is where my questions begin...

    I always wanted a Remington 700 in .257 Weatherby Mag (my favorite whitetail caliber). What all extensive work will need to be done to convert this gun to a .257 Wby Mag, other than the barrel? Will the bolt-face have to be opened up? Is it even possible to convert from a .25-06 to a .257 Wby while using the standard long-action?

    Thanks guys

    Austin
     
  2. WildRose

    WildRose Well-Known Member

    Messages:
    8,210
    Joined:
    Feb 3, 2011
    First thing I'd do is give it a REALLY good cleaning with something like Gunslick foaming Bore Cleaner. Follow the directions and repeat until you see no color blue, black, or green coming from the bore.

    Then have a good gunsmith scope it and tell you what kind of shape it's in.

    To convert it you'd at a minimum need to cut it back and rechamber it. Not sure but the bolt face may have to be changed as well.

    If it indeed is "shot out" then you'd have to start over with a custom barrel.
     

  3. Buffalobob

    Buffalobob Writers Guild

    Messages:
    5,085
    Joined:
    Jun 12, 2001
    The bolt face has to be opened to a mag diameter. If the barrel is in good shape then it can just be rechambered to 257Wby, perhaps with a quarter inch of set back to clean up the shoulder angle if I remember correctly. But while all that is being done you should have the action trued and bedded and the trigger adjusted and might as well recrown. If you set back the barrel very much then you have pretty much defeated the benefits of the extra case capacity and might as well stay with the 25-06 which is a nice cartridge in its own right

    If you want a new barrel which would be the better way to go, then that has to be chambered threaded and and crowned. The question of twist rates and length arises and that depends upon your intended use of the rifle. There are a few custom bulletsmiths out there making decent long range bullets in 257 and with those bullets it is really a great long range caliber but you need a twist that will stabilize them.
     
    Last edited: Jul 18, 2011
  4. MudRunner2005

    MudRunner2005 Well-Known Member

    Messages:
    10,076
    Joined:
    Oct 13, 2008
    I was planning on sticking with the same Weatherby brand 110gr Accubond loads that I shoot from my AccuMark, so I was gonna use the same twist as it has.

    So, as long as the tube isn't shot-out, then I can just have the barrel rechambered and the bolt face opened up, correct? A few more qiestions...What about a new floor-plate follower for the internal magazine...Won't I need a bigger one? What caliber should you buy one of those for to make it fit right?

    What brand of barrel do you recommend?

    This gun has already had the trigger worked, but could use tightening up on slack adjustment, and lighter pull (to be within my liking).

    I have a local gunsmith that will be doing all the work, he's really good. Built me my last .308, until it got stolen back in '08. He does flawless work.

    So...Is there anything else I'm missing?
     
  5. WildRose

    WildRose Well-Known Member

    Messages:
    8,210
    Joined:
    Feb 3, 2011
    Have your gunsmith tell you what twist rate the bbl has (assuming it's a good bbl) and that will tell you whether or not the same bullet/load should work well in it once rechambered as you are using in the other rifle.
     
  6. roninflag

    roninflag Well-Known Member

    Messages:
    3,226
    Joined:
    Feb 27, 2006
    trigger - google remington crisp you can do it your self easy. you can get some idea of the barrel usage by using a hornady oal gauge. you can just rechamber the factory barrel and open the bolt face. the follower should work fine if not i would think you could get a mag follower cheap. if you do rebarrel at some point i would get a krieger.
     
  7. Buffalobob

    Buffalobob Writers Guild

    Messages:
    5,085
    Joined:
    Jun 12, 2001
    The standard 10 twist will stabilize the 100 grain bullets. I have a 8 twist in my 257Wby and can stabilize 142 grain bullets. But then I handload everything and have a minimum SAAMI chamber with a target leade.
     
  8. MudRunner2005

    MudRunner2005 Well-Known Member

    Messages:
    10,076
    Joined:
    Oct 13, 2008
    Well, not postive if I'll be able to get it now....Just found out funds are gonna be coming up short for the next couple weeks. Hope it's still there when my money gets back right...Damn....That's a bummer.

    Anyone wanna buy a boat? That would really help to kill my debt issue. :D
     
  9. Buffalobob

    Buffalobob Writers Guild

    Messages:
    5,085
    Joined:
    Jun 12, 2001
    I think this was written for you.

    [ame=http://www.youtube.com/watch?v=K5LnpErE6f4]‪Ya Ya- Lee Dorsey-original song-1961‬‏ - YouTube[/ame]
     
  10. MudRunner2005

    MudRunner2005 Well-Known Member

    Messages:
    10,076
    Joined:
    Oct 13, 2008
    Sorry, I don't get it......
     
  11. Buffalobob

    Buffalobob Writers Guild

    Messages:
    5,085
    Joined:
    Jun 12, 2001
    Its a song about a guy who is still hoping something good is gonna happen but is staring reality in the face.
     
  12. MudRunner2005

    MudRunner2005 Well-Known Member

    Messages:
    10,076
    Joined:
    Oct 13, 2008
    Hey, if I sell my boat, then I'll be able to get several new toys......

    gun)

    So, like i asked before.....Anyone wanna buy a boat? :D
     
  13. 4xforfun

    4xforfun Well-Known Member

    Messages:
    1,252
    Joined:
    Oct 1, 2007
    Just curious....who makes a 142 gr 25 cal bullet? It must be a specialty hunting bullet.
     
  14. Buffalobob

    Buffalobob Writers Guild

    Messages:
    5,085
    Joined:
    Jun 12, 2001
    The name of the forum is Long Range Hunting. :D

    The general problem with the 25 cals is that the bigger bullet companies do not make any long range hunting bullets in 25 cal so everybody just makes do with poor choices of medium range bullets.

    From Left to Right
    257Wby with 130 gr RBBT HP Wildcat
    7mm 200 gr RBBT HP Wildcat
    257 cal 142 gr RBBT HP Wildcat
    257 cal 130 gr RBBT HP Wildcat
    6mm 115 gr Berger (IIRC)


    [​IMG]