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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Allen Xpress coming along.....
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<blockquote data-quote="Fiftydriver" data-source="post: 161824" data-attributes="member: 10"><p>Dave,</p><p> </p><p>With the capacity advantage and the case strength advantage of the AX over the Edge you will get 100 to 125 fps more velocity with same pressure in same barrel lengths from what I am seeing so far with my limited testing.</p><p> </p><p>Another way to look at it is that the AX will get you same velocity as the Edge but with the next step up in bullet weight.</p><p> </p><p>With the added strength of the Lapua case, I am hoping I can push things a bit harder in pressure and get over that 3000 fps level in this 27" barrel length.</p><p> </p><p>None of these rounds are dependant on barrel length to be honest. You will only get around 18 fps more velocity per inch of barrel length over 26" so I suspect the difference between a 29 and 27" barrel would only be around 30 fps with this class of chambering. Variations from one barrel to another will cause more velocity change then that will.</p><p> </p><p>We will see soon what she will do. It is true the stouter jackets and longer baring surface will slow things abit. Thats where I am hoping the larger case capacity and ability to use higher chamber pressures pays off to break 3K. If your comfortably getting 3100 fps in a 29" barrel with a 250 gr pill I think I should easily be able to get 3000 fps with a 265 gr and 27" barrel.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 161824, member: 10"] Dave, With the capacity advantage and the case strength advantage of the AX over the Edge you will get 100 to 125 fps more velocity with same pressure in same barrel lengths from what I am seeing so far with my limited testing. Another way to look at it is that the AX will get you same velocity as the Edge but with the next step up in bullet weight. With the added strength of the Lapua case, I am hoping I can push things a bit harder in pressure and get over that 3000 fps level in this 27" barrel length. None of these rounds are dependant on barrel length to be honest. You will only get around 18 fps more velocity per inch of barrel length over 26" so I suspect the difference between a 29 and 27" barrel would only be around 30 fps with this class of chambering. Variations from one barrel to another will cause more velocity change then that will. We will see soon what she will do. It is true the stouter jackets and longer baring surface will slow things abit. Thats where I am hoping the larger case capacity and ability to use higher chamber pressures pays off to break 3K. If your comfortably getting 3100 fps in a 29" barrel with a 250 gr pill I think I should easily be able to get 3000 fps with a 265 gr and 27" barrel. Kirby Allen(50) [/QUOTE]
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338 Allen Xpress coming along.....
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