308 barrel bored out to 375 ?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by hemiford, Dec 25, 2013.

  1. hemiford

    hemiford Well-Known Member

    Messages:
    263
    Joined:
    Oct 7, 2013
    Have a factory Rem 700 in 300 RUM, wondering if there is enough
    meat in the barrel to have it bored to 375 (RUM), and still shoot
    with accuracy, I guess is what I mean.
    Does anyone know if Remington uses the same 26-in barrel blanks
    for all their RUM caliber offerings ? Same external contour, that is ?
     
  2. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,384
    Joined:
    May 13, 2012
    I was going to just say no, but I measured my 7rum, 300rum, and 375h@h lightweight to be sure. No brakes or other bbl. alterations on any of the rifles.

    300 rum m700bdl lh
    .645" at muzzle (26" factory bbl)

    7mm rum m700 lss lh
    .657" at muzzle (26" factory bbl)

    375 h@h rem lightweight one of 500 sps d.g.
    .660" at muzzle (24" factory bbl)

    You'd be tight for sure... my 375 is a sub moa rifle with 270 speer bt's and 300 barnes tsx so even in a trim profile 37 cal will still turn in accuracy.
     
  3. hemiford

    hemiford Well-Known Member

    Messages:
    263
    Joined:
    Oct 7, 2013
    Thank you very much, kind sir! That is invaluable info !
    I owe you a beer.
    Now I need to search back for that thread about barrel makers
    who do re-bores.
     
  4. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,384
    Joined:
    May 13, 2012
    I've never used these guys...... but I got the link off a thread here and they weren't complaining.... Classic Barrel Works....

    thought the concept interesting enough to save the link...
     
  5. adam32

    adam32 Well-Known Member

    Messages:
    1,027
    Joined:
    Nov 14, 2007
    For the price, just buy a new barrel...
     
  6. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,384
    Joined:
    May 13, 2012

    I concur in this case.

    There isn't much bbl. left for a re-bore to work well here. Probably better to talk to er shaw or similar if you want an economy barrel. If you can spring for more, by all means do, but keep your uses in mind here. If you are only shooting your 375 to a couple of hundred paces as most are, anything holding moa will do, and cheap factory pipes do that in this cal.. If you are looking to stretch her out, then hang the best barrel you can find.

    I'm not saying it couldn't be done, but it may not be your best option.
     
  7. hemiford

    hemiford Well-Known Member

    Messages:
    263
    Joined:
    Oct 7, 2013
    Yes, if a barrelmaker had a factory replacement 26" 375 RUM in stock,
    that might be a better choice, depending on wait time, dollars, etc.
    More internet homework and phone calls.
    Any number of barrelmakers do custom work, are there any that tend
    to stock replacement barrels ?
     
  8. Kennibear

    Kennibear Well-Known Member

    Messages:
    492
    Joined:
    Jul 24, 2012
    hemiford

    You are so close in price to an economical replacement barrel why not get one and add a few inches of length to boost the FPS? Even if it adds a pound of weight the recoil of a 375 RUM will make you appreciate that pound.

    Sell the take off and get back some of your money to help pay for the new tube.

    KB
     
  9. shortgrass

    shortgrass Well-Known Member

    Messages:
    2,118
    Joined:
    Mar 31, 2010
    Most modern made factory barrels do not make good candidates for re-boring and re-rifling.
     
  10. MontanaRifleman

    MontanaRifleman Well-Known Member

    Messages:
    6,068
    Joined:
    May 21, 2008
    IMO, you are taking a big gamble by trying to bore out a sporter barrel to 375 cal. and hoping for an accurate shooter. I think your odds of getting something that will shoot sub MOA is less than 50/50. It might work... but it is definitely a gamble.

    Also, you will increase your chance for good accuracy if you go with a 24" vs a 26" barrel, especially in 375 and you will loose very little performance with the shorter barrel.

    If you go on Midway, you can get a Green Barrel for $92 plus shipping or a Shilen from $175 to $250 plus shipping. I think this is a lot better way to go.
     
  11. hemiford

    hemiford Well-Known Member

    Messages:
    263
    Joined:
    Oct 7, 2013
    Well, of course I can't dispute all the good points brought up.

    On one hand, I didn't want another big project and was investigating
    a cheap and easy solution, I know that when you go too cheap you usually
    get just what you pay for.

    On the other hand, I could get a custom barrel, thicker longer harder etc,
    rework the barrel channel or get a new stock, turn my Mustang into a GT-40.

    All honorable directions to take.