50 BMG Barrel life?

Discussion in 'Extreme Long Range Hunting & Shooting (ELR)' started by long450, Aug 9, 2018.

  1. long450

    long450 Well-Known Member

    May 5, 2007
    For those shooting 50 BMG target rifles, what kind of barrel life are you getting. I would like to know what brand and twist barrel with which powder and what bullet.
  2. ELR Researcher

    ELR Researcher Well-Known Member

    Aug 11, 2009
    Way, way, way too wide open. Because of the dramatically larger size of the .50 BMG cartridge, its a whole new world.

    Most folks on this and most other shooting forums are shooting well under .50 BMG. Suggest that you become a member of FCSA and then get on the Members Only Forum - http://fcsa.org/members/ Actually, you may be able to get access without membership...but get called for not being a member. They also have a sub-forum for those new to 50s, called, amazingly, "New to Fifties".
  3. long450

    long450 Well-Known Member

    May 5, 2007
    Thanks for the reply!
  4. J E Custom

    J E Custom Well-Known Member

    Jul 29, 2004
    I did not find any significant differences in the 50 BMGs barrel life. the bullet weight to powder and velocity is not that much different from other cartridges.

    Heat is the only real difference because of the amount of powder used and would be my concern.

  5. Mach 1

    Mach 1 Well-Known Member

    Jan 11, 2018
    I cant afford to shoot my 50 enough to burn out a barrel
    lgordee likes this.
  6. 300whisper

    300whisper Well-Known Member

    May 15, 2012
    Scammer...stay away from hunterslife72. Not only does he scam, but now he plagiarizes.
  7. TXAoudadKlr

    TXAoudadKlr Well-Known Member

    Apr 10, 2013
    Since it’s basically a scaled up 30-06, probably very similar to the barrel life of a typical 30-06 would be what I’d imagine.
  8. wildcat455

    wildcat455 Well-Known Member

    Sep 13, 2017
    The math would indicate differently, so I'm posting it up for consideration.

    Cartridge overbore index ratio comparison:

    Cartridge Case capacity bore area overbore ratio
    26 Nosler 99 .05723 1730
    28 Nosler 99 .06261 1581
    50BMG 300 .20093 1493
    7/300 WM 92 .06261 1470
    300 Norma 104 .07335 1418
    30 Nosler 97 .07335 1322
    300 WM 94 .07335 1282
    338 LM 113 .08813 1282
    30-06 68 .07335 927

    Search cartridge overbore calculation for more.

    To find your cartridge's overbore index ratio:
    (Not sure why I'm typing this, no one will probably do it.. it's MATH!! LOL!)

    Measure the water volume in grains of a fired case from your rifle, or if already known, (google is your friend, Chuck hawk's lists some common capacities) use that value.

    If the caliber of your cartridge happens to be one of the above, use the number under the heading "bore area" for your caliber. If you've got this number, you can skip to the bottom. ***

    If not, Whip out your calculator, or app on your phone.

    Use the diameter of your bore to find the radius of your bore. R=D/2 (so divide the diameter of your bore by 2, resulting number is the radius of your bore.)

    Then use the formula for area of a circle to find the bore area, which is A=pi x (RxR)
    Spoken, this formula is stated:

    Area equals pi R squared

    First multiply your bore radius times itself, multiply that times pi, the product is the area of your bore.

    *** Now, divide the case capacity number by the area number. The quotient is your overbore index ratio.