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AV 375 Barrel change

Discussion in 'Sako Long/Magnum Actions' started by USAF Arky, Nov 25, 2022 at 2:06 AM.

  1. USAF Arky

    USAF Arky Member

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    Can I change out my 7mm Mag AV barrel with a 375 H&H barrel? Looking for a little more horsepower for a bison hunt. The bolt face and barrel taper measure the same. Did a 375 have a different lug arrangement? Or maybe a magazine follower? This is for an ordinary hunter model.

     

  2. Spaher

    Spaher Well-Known Member

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    My opinion is no need for a .375 H&H & cost of rebarreling with a possible loss in value as you might just consider a change in bullet weight & type on the 7mm Magnum for bison.
    Suggested caution on bison as need study their skeletal anatomy as their spine is not where you’d expect but much lower as they have huge vertebra facets that form their hump and neck with leg bones/scapula far forward when planning impact damage. Bullet placement crucial if planning a drop in place.
    My 2 cents. 18A58870-13ED-4C49-BE8A-264F56BB31EE.png
     
    Last edited: Nov 25, 2022 at 2:41 AM
  3. USAF Arky

    USAF Arky Member

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    I have an AV 375 barrel. Actually it probably came from an AIII since it is 24” and the caliber is marked on the side not the top. Great tip on the bison anatomy. Been studying it also.
     
  4. gowyo

    gowyo Sako Junkie

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    Howdy Arky, good luck on your upcoming hunt. I agree with Spaher, 7mm RM with heavy, well constructed bullets will work. One other difference, .416-.338 cal AV's have 2 cross bolts in the stock. There is only one in other calibers, that might be noteworthy.
     
  5. Bucktote

    Bucktote Well-Known Member

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    Hi Arky,
    The spine & skeleton pic. that Mr. Spaher provided is the info you need. Place the round at the junction of the spine & shoulder & it's lights out!!Best of luck & practice is the key!!! B/T
     
  6. stonecreek

    stonecreek SCC Secretary SCC Board Member

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    I don't disagree that a heavy 7mm bullet will do just fine for bison.

    Speaking strictly from a technical viewpoint, all that is required to change a Sako AV 7mm RM to .375 H&H would be to properly fit the barrel. The magazine, bolt face, etc. are all the same. If done by a competent gunsmith you could even have the barrels switched back if you desired.
     
  7. USAF Arky

    USAF Arky Member

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    My understanding of the 2nd cross bolt was that it was required with the newer style Tikka trigger. My AV has a #4 with 1 cross bolt. I have seen many AV 375 with only 1 cross bolt that appear factory. I have bedded my rifle action and barrel in Acraglas. I use Swift 175 grains a frames behind Reloder 26 on elk. 3/4 MOA out to 300 yards.
     
    Bucktote likes this.
  8. Spaher

    Spaher Well-Known Member

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    Then it sounds like you’ve got it covered. No input needed. Good hunting.
     
    USAF Arky and Bucktote like this.
  9. kevinlg

    kevinlg Well-Known Member

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    What better excuse......to buy a new rifle??!!
     
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  10. Jeffy1

    Jeffy1 Well-Known Member

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    For what it is worth, the bison I have taken have been with a 30.06 and 180 Sierra. One shot.
     
  11. USAF Arky

    USAF Arky Member

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    This once in a lifetime bison hunt just has me doubting I have enough rifle. I have been practicing shooting from a pack since August. Thanks for all your input. It is much appreciated.
     
  12. Jeffy1

    Jeffy1 Well-Known Member

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    Arky, be of good cheer. your hunt will go well. Bison hunting, as I am sure you have figured out, is not like hunting elk .
     

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