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12ga,10ga,8ga,4ga FH; 585HE/700HE; Other Big Bores--

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  • The guys that did the super accurate 416 HE did another
    416 HE that has an 8" longer 42 inch K&P barrel..

    Used a Stiller action and same load with 475 gr bullet, as in
    first gun and and gained about 200 fps with good accuracy.
    3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

    And loads they used are not the highest speed loads
    the cartridge is capable of....Here is print with specs for
    the 416 HE reamer chamber ....Ed....


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    • More about he guys that did the accurate 416 HE, they did a
      416 HE that has an 8" longer 42 inch K&P barrel..

      Used longer barrel and the same load with 475 gr bullet, as used
      in the first gun and and gained about 200 fps with good accuracy,.
      3065 fps. Tested 2 groups of 3 and less than 1/2 min moa.

      And loads they used are not the highest speed loads
      the cartridge is capable of....Here is picture.......Ed....



      Comment


      • Away for a time, sickness..
        Here is print with chamber reamer specs for the
        416 HSM chamber..There are 3 base sizes we have,
        depending on actions used. Got reamers for all 3..
        Got cases for all of them..
        Our cases are public domain, so that is why I post
        info and specs. To help guys do their own setups.
        Manson makes reamers I use,,, Ed.


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        • Here is reamer print with chamber reamer specs for
          the 460 HSM chamber .Couple guys getting set
          to do 38-40 inch heavy 458 target barrels...Ed....


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          • With 40 inch barrel 416 HSM ,475 gr, get 3650, over 13,000 ft lbs muzzle energy.
            Got guys getting set to have 38-40 inch 458 barrels made for 460 HSM.Ed..

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            • More info on this gun, we did it for testing 416 HSM with a rebated rim,
              to check in intermediate size actions, with the longer, stronger, bolt lugs, Ed..

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              • Here is experimental action for 416 HSM in a heavy
                stock....We lengthened port a little, set bolt stop back ,
                opened bolt face fit the 416 HSM rebated rim. Ed.

                Here is comparison of Montana PH to Pierce action we
                modified to use for rebated rim 416 HSM testing..Ed.

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