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    1917 Eddystone Range Photos

    This is the M1917 Eddystone that has been passed around the family for three generations. My Dad got if from CMPicon back in the late 1940's for what we pay today for a box of cheap ammo.

    He mildly sporterized it, but never used it much in later years. It is now with my son in Montana. He and I get it to the range anytime I visit.

    First target is 100 yards. Second target is 200 yards.

    Enjoy the photos:



    Shooting with the as issued iron sights.

    100 Yard Results


    200 Yard Results




    Last edited by Group Therapy; 04-08-2017 at 12:00 PM.

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    Seems to shoot about like it should...
    Regards, Jim

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    Thread Starter
    We are actually surprised that is does this well. But after heating up at about 15 rounds there is a lot of drop. Maybe from barrel droop.

    Or is the drop on heating also a sign of a worn out barrel?

    It is a fun gun to shoot. And a hoot at the range when the young guys show up next to us with their AR stuff with all the glass on top. I have helped some of them get dialed in. But they are amazed that an old mil surp can actually hit a target with iron sights. I help broaden their world a bit. We all laugh and have fun and are better for it.

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    Quote Originally Posted by Group Therapy View Post
    Or is the drop on heating also a sign of a worn out barrel
    Possibly from the barrel opening up a bit and losing some of it's traction. I had a .30 cal rifle once that climbed off the target when it warmed up...straight up.
    Regards, Jim

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    Quote Originally Posted by Group Therapy View Post
    Or is the drop on heating also a sign of a worn out barrel?
    Hmmm? Plausibility check?
    Coefficient of thermal expansion of steel is about 12 millionths per degree C at human environment temperatures.
    So taking a 0.30 barrel out of the freezer at 0 C and firing it so rapidly that it heats up to boiling point - 100 C - will increase the bore by 12 x 100 x 0.3 millionths of an inch.
    Or about 0.36 of a thou.
    More plausible would be from 10 C on a cold day up to 50 C (when you can't hold it any more).
    About 0.12 of a thou.
    If that makes the projectile so loose that there is a noticeable loss of muzzle velocity, then the barrel might indeed be marginal, i.e. very worn.
    Not worn-out - it's not a bench-rest system! Worn-out is when the rifle is useless for the intended purpose. The 100 yd group seems OK to me.

    Just shoot slowly (1 min between shots) and regularly, and see if the grouping then becomes tighter.

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    Quote Originally Posted by Patrick Chadwick View Post
    Hmmm? Plausibility check? ...
    More plausible would be from 10 C on a cold day up to 50 C (when you can't hold it any more).
    About 0.12 of a thou.
    If that makes the projectile so loose that there is a noticeable loss of muzzle velocity, then the barrel might indeed be marginal, i.e. very worn.
    Not worn-out - it's not a bench-rest system! Worn-out is when the rifle is useless for the intended purpose. The 100 yd group seems OK to me.

    Just shoot slowly (1 min between shots) and regularly, and see if the grouping then becomes tighter.
    Thanks. We will keep at it. Awe shucks. More range time. Thanks for the details on what might be going on. Certainly this old rifle has its limitations. But it is fun figuring them out.

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    ... and try different ammo. The Prvi /PPU is not exactly bench-rest material. If the bore is worn, you can bet that the throat is as well. Seating the bullets a trifle further out, and/or using longer bullets (i.e. 168gns) can help to compensate for this by proving better bullet guidance in the transition from the case neck through to the full rifling.


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