Enaa baasee' Sir Bob,
The lore of the .458 Winchester Magnum is duly annotated with latest Federal Factory
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Trophy Bonded bear Claw 400-gr MV in 24" barrel (Ruger No. 1) at 45*F: MV = 2282 fps.

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The Federal Factory ammo with old version TBBC 400-grainer was also advertised at 2250 fps MV but
in my 24" barrel (M70 Winchester) at 77*F 8-shot instrumental average = 2333fps, MV = 2345 fps for BC = 0.353.
Standard deviation for those eight shots = 23.9 fps.
As usual, we know we can do better with handloads.

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At least the new TBCC seems to be a better bullet than the old one,
and they are getting closer to hitting the advertised velocity, exceeding it by a lesser amount, not bad, heh-heh-heh.
Probably can't get them as component bullets (?) for hotting up to .458 WM+.


Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.