
10-06-2010, 09:08 AM
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Beartooth Regular
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Join Date: Jun 2009
Posts: 742
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The fastest "practical" number would probably be in the neighborhood of around 4100fps. I only state that because there are reports of a 22 middlestead pushing a 30 grain pill at around 5200fps or so. Beyond that I doubt that there are too many bullets that would even survive the spin rate needed to stabilize the bullet. Otherwise you would have to get into much larger military hardware involving larger calibers and propellants not quite available to you and I.
But within the realm of .224 caliber bullets you would need a whole "new" cartridge and barrel lengths both of which needing to be larger and longer than what's currently available without excessively high cost to achieve the 5000fps mark with a 55 grain bullet.
But within a practical range, I think 3800-3900 fps is about the best your going to do with the 223 WSSM with a 55 grain bullet.
Look up "diminishing margin of return" and you'll see why the velocities are what they are on factory ammo.
Last edited by GMFWoodchuck; 10-06-2010 at 09:11 AM.
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