Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

Sir Tony,

Nov. 1955 published lab data on the factory 500-gr FMJ showed 2087 fps instrumental in a 25" barrel.
See bottom line of load data below (from NRA, Gen. Hatcher's RIFLEMAN article):



My 2080 fps in a 25" Shilen barrel was corrected to MV.
But I think the Shilen groove diameter might have been 0.4585" instead of the tighter original 0.4582".
And my temp was 50*F instead of 76*F.
Just about identical results considering those differences in test bed, after 64 years on the shelf for your 1957 vintage.
Buy a donkey for taking such good care of that factory ammo.

Inspirational material for Sir Jerry: