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S&W 64-7 convert to .357?

roscorosco Member Posts: 79 ✭✭
edited May 2006 in Ask the Experts
What would be involved to change a New 64-7 .38+p to .357mag?

Comments

  • Laredo LeftyLaredo Lefty Member Posts: 13,452 ✭✭✭
    edited November -1
    I agree, why not just sell it and buy a magnum?

    It probably won't work anyway. The cylinder length of the model 64 is 1.56" and the magnum cylinder in the model 66 is 1.62" with the newer non-counterbored cylinder and 1.67" with the older counterbored cylinders.

    Even if you could do it, you would void any warranty still in effect on the gun and expose yourself to liability if someone were to get hurt using that gun. A personal injury lawyer would love to find out that you made a magnum gun out of a gun that was designed to shoot .38 spl only.
  • nmyersnmyers Member Posts: 16,796 ✭✭✭✭
    edited November -1
    I don't recall ever buying a S&W that came with a warranty. Still, the conversion sounds like a dangerous thing to do.

    On top of the other problems mentioned, .38 spec & .357 mag barrels have different rifling twist rates in most guns. (Why else would Colt have made a Python in .38 spec?) So, accuracy would not be optimal.

    Neal
  • Laredo LeftyLaredo Lefty Member Posts: 13,452 ✭✭✭
    edited November -1
    Neal...... There are Smith & Wesson warranty service centers all over the world with 5 of them in the US. Check out their web site.
  • select-fireselect-fire Member Posts: 69,482 ✭✭✭✭
    edited November -1
    quote:Originally posted by nmyers
    I don't recall ever buying a S&W that came with a warranty. Still, the conversion sounds like a dangerous thing to do.

    On top of the other problems mentioned, .38 spec & .357 mag barrels have different rifling twist rates in most guns. (Why else would Colt have made a Python in .38 spec?) So, accuracy would not be optimal.
    Neal


    Just buy yourself a real .357
  • roscorosco Member Posts: 79 ✭✭
    edited November -1
    The model 66 and 686 are not the same as a 64 or 65 as you should know,its the sights, Barrel contour.Could buy a 65 getting harder to find.
    Won't sell the 64,never sell any guns.
    So cylinder is too short,wrong twist in barrel.
    Not to worried about the concern for Smith Wesson.
    Treason is there middle name
  • Hawk CarseHawk Carse Member Posts: 4,320 ✭✭✭
    edited November -1
    You get some strange answers on the Internet.

    The SAAMI specification for OAL is the same for .357 Magnum as it is for .38 Special. The bullets are seated deeper in the longer Magnum case. Cylinder length is not a factor unless you load true Keith bullets.

    S&W standard rifling for all .38 caliber barrels whether .38 S&W, .38 Special, or .357 Magnum is 18 1/2" twist.
    (Colt standard rifling .38-.357 twist is 14", they made .38 Special Pythons with shorter chambers so the bullets would not have a jump from case to cylinder throat.)

    The real reason not to rechamber a Special to Magnum is that the Special cylinder may not be heat treated to take the nearly double pressure of the Magnum. They did not used to be.
  • abcguns2abcguns2 Member Posts: 2,320 ✭✭✭✭✭
    edited November -1
    Well,speaking as a 'gunsmith' , Do Not Do This , most likely will not find any-one who knows what they are doing to do this project.
    The cylinders Will Not interchange .......
    Thanks !!!
    d.a.stearns
    Gunsmith / LEO
    Niota , Tn
  • Laredo LeftyLaredo Lefty Member Posts: 13,452 ✭✭✭
    edited November -1
    Hawk Carse......... Cylinder length IS a factor when its too long to fit in the gun.

    I was not refering to the depth of the chamber holes, but the overall length of the cylinders. Unless he wants to grind some metal off the rear end of the barrel, a magnum cylinder will not fit in the model 64.

    Either way, its not a good idea to try that type of conversion.
  • JamesRKJamesRK Member Posts: 25,672 ✭✭✭
    edited November -1
    Even if you did it, you would probably have more money in it than it you just sold it and bough a .357.
    The road to hell is paved with COMPROMISE.
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