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Hornady specify 2050fps for the 450/400 on their ammo box, chronographed at 1940fps in my 24" barrel, far short of that specified! (Unless they use a 28” test barrel

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Go to the Kynamco website http://www.kynochammunition.co.uk/cartridge%20collection.html
David Little loads the “modern Kynoch” cartridges to the original specifications, even using the original test barrels. They list all loads with the test barrel lengths.
.450/400 3 ¼”: 400 gr bullet at 2150 fps from a 26” test barrel
.450/400 3”: 400 gr bullet at 2125 fps from a 30”! test barrel
.404: 400 gr bullet at 2125 fps from a 28”! test barrel
.416 Rigby: 410 gr bullet at 2300 fps from a 26” test barrel
Don’t expect to get these advertised velocities from your real hunting rifle with a 22 – 24” barrel.

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