Why is the 458 Lott Chambered for .450 Watts?

Discussion in '.375 & Up' started by 2L8, Dec 14, 2018.

  1. 2L8

    2L8 AH Veteran

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    A friend asked a question?

    It appears most (if not all) .458 Lott Rifles are chambered for .450 Watts. Why? Was it a case of early rifles being built using Watts Reamers and it became traditional?

    Lott = 2.80" Case

    Watts = 2.85" Case

    Same Taper.

    Is it a case of allowing for the making of cases out of the .375 H&H and not trimming to proper length and they didn't realize by lengthing they had replicated the .450 Watts Chamber?
     

  2. CAustin

    CAustin AH ENABLER BRONZE SUPPORTER AH Ambassador

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    It aware of this myself. Interesting question however.
     

  3. fsrmg1

    fsrmg1 AH Veteran

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    I heard that the Lott is shorter because when cases are made from 375 H&H Mag, they shorten up a bit when blown out to the 458. A portion is also taken off after the case is blown out when the neck is trimmed back square.
     

  4. postoak

    postoak BRONZE SUPPORTER AH Enthusiast

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    So you are saying that .450 Watts ammo will always chamber in a .458 Lott rifle?
     

  5. Luvthunt

    Luvthunt AH Enthusiast

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    I thought there was a difference in the taper?
     

  6. Luvthunt

    Luvthunt AH Enthusiast

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    Error in above—-difference in length—
     

  7. IvW

    IvW AH Legend

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    Nope other way around..the Watts cartridge is slightly longer than the Lott....458 WM can be fired in both if the need arises. 2.8" vs 2.85".

    The .450 Ackley Magnum will however will accept the the Lott as well as the Watts...
     

  8. 2L8

    2L8 AH Veteran

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    Lott = 2.80" Case
    Watts = 2.85" Case
    Lott Marked Rifles I've looked at are cut for the 2.85" Case (Doesn't make them all that way).

    I was curious if that was because of the reamers initially used (Watts Reamers), intentional in case of wrong ammo or accidental (extra allowed for growth and just happened to coincide).
     

  9. 86thecat

    86thecat New Member

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    Fifty thou too long will still allow a case with heavy crimp to chamber relatively easily in the shorter chamber but the case neck will not expand enough to release the bullet. I believe that safety issue is why most Lotts are chambered for 2.850 brass. Beside shorter brass when cases are made from from .375 IIRC some bullets are too long above crimp groove to cycle thru a 3.60 magazine when used with 2.850" cases, hence the shorter brass length of the Lott.
     
    Von S. likes this.

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