Probabaly a 600mm/23.6" barrel on the Whitworth.
Here is a 25" Shilen that is about average for barrel speed:

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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.