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  1. Replies
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    We had a M240 machine gun barrel that we put over...

    We had a M240 machine gun barrel that we put over 60,000 rounds on in testing. It only had shadows of rifling left at the last 4" to the muzzle. It still shot a 12" group at 200yds, which was...
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    For many years, the go to load for 600 yard...

    For many years, the go to load for 600 yard Hi-Power was 168gr SMK and 41.5gr IMR-4895. This was the standard back in the 80's when I started shooting.
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    I knurl the outside of my pillars before gluing...

    I knurl the outside of my pillars before gluing them in. Bead blast and clean thoroughly with acetone also. Have not had one come loose.
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    Not Hatcher. We duplicated his testing of live...

    Not Hatcher. We duplicated his testing of live rounds in a fire, remotely set off a 7.62mm M80 round and had nothing penetrate a cardboard surround. Caught it all on High Speed video.
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    Practice with a .22LR at a 100 yards if that is...

    Practice with a .22LR at a 100 yards if that is all the range available to you.
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    I would think that the scope power you need will...

    I would think that the scope power you need will vary depending upon size of varmints and the average distances being shot. Here in the east we shoot woodchucks (groundhogs)and the average distance...
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    List it as a form tool. Machine tools.

    List it as a form tool. Machine tools.
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    The test barrel requirements , that were written...

    The test barrel requirements , that were written back at Frankford Arsenal, are for uniformity in test equipment. The test barrels are used for ammunition testing during manufacturing, so some...
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    Some take down rifles had an adjustment in them...

    Some take down rifles had an adjustment in them for wear. It was usually in the front plate that the barrel was attached to. Possibly add some sort of shim plate here to apply pressure towards the...
  10. This is one www.wswells.com The South Bend sub...

    This is one www.wswells.com The South Bend sub forum on Practical Machinist has some too, probably double posted.
  11. Many pictures on the South Bend forum of the...

    Many pictures on the South Bend forum of the salesmans display vehicles
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    Check to ensure that the barrel bore and the...

    Check to ensure that the barrel bore and the suppressor bore are concentric. When I thread for a suppressor, I dial the bore in the same as if I was dialing in for a chamber. Then check it after its...
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    Action wrench fitting

    If you have a loose fitting or homemade action wrench, it can be made to fit with Steel Bed or JB Weld. Just cat the action real well with release agent and make the custom jaws. Usually easier to do...
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    We track bullets with Doppler radar, multiple...

    We track bullets with Doppler radar, multiple acoustical targets, Oheler chronographs, and the Sydor system. Bullets do all sorts of interesting things when fired.
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    Then please explain why we have documented proof...

    Then please explain why we have documented proof of rifles that shoot 1/2 moa at 600 yards shooting larger groups at 100. Our M14NM rifles would shoot tight 1/2 moa groups with 168gr SMK at 600 using...
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    We do this testing everyday and can see the...

    We do this testing everyday and can see the bullets pitch and yaw. By varying the velocity or twist rate we can make the bullet "go to sleep" We are using a Sydor Technologies Y.A.W. (Yaw Analytics...
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    You can also reduce your velocity if you are...

    You can also reduce your velocity if you are having accuracy problems with the lighter bullets. The bullet stability is based on the bullets rotational speed, which is controlled by the velocity and...
  18. Thread: 222 rem

    by MilGunsmith
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    I have a 722 also in .222. It only likes BL(C)-2...

    I have a 722 also in .222. It only likes BL(C)-2 and 50gr bullets. It has the rear sight base bulge on the barrel.
  19. The advantage to the adjustable stop, is in being...

    The advantage to the adjustable stop, is in being able to hit the dimension you want easily and repeat it. Unlike a fixed stop, for the first chamber, you set the adjustable stop to give you a short...
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    We experiment with reduced loads all the time at...

    We experiment with reduced loads all the time at work. We have found that powder location affects pressures. This is why we do the "Frankford Roll" with all ammo as we load it into the Universal...
  21. I use one to cut all of our Universal Receiver...

    I use one to cut all of our Universal Receiver test barrels. They reference headspace off the breach end of the barrel. Set the stop once and I get identical chambers every time. I leave a stop setup...
  22. Thread: My Spidah

    by MilGunsmith
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    When you mount it to a good back plate, make sure...

    When you mount it to a good back plate, make sure you have a balanced setup. Using 3 out of the 4 holes may throw an out of balance vibration at speed.
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    Having seen the list of gun control wants from...

    Having seen the list of gun control wants from the Clinton-Brady meeting 20 years ago, one of the big things on the list is "Sniper Rifles". They describe them as scoped accurate rifles. Sounds like...
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    I have someone in Arkansas looking for a mill....

    I have someone in Arkansas looking for a mill. Where are these located?
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    If I have thick sections to bed, I usually do it...

    If I have thick sections to bed, I usually do it in two steps so that the first thick coat has a chance to cure fully and to shrink.
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