That 2800 fps MV with a 250 grain 0.358” bullet is a stretch, even for the 358 NM, and unattainable in a 35 Whelen, regardless of barrel length. Didn’t know they had crack available when that article was written, but the author was obviously on some psychedelic fantasy trip.
The 358 MAN, my wildcat based on a 300 Win Mag case modified along the lines of the Gibbs case model and fired in a 22” barrel will yield an honest 2750 FPS MV with a 250 grain SP bullet, without launching the pieces of the rifle and shooter into a reddish haze. However, the case capacity of the 358 MAN is a bit over 90 grains of water to the body-shoulder junction.
That ancient article was a hoot to read. Wonder if the chronograph cited was a ballistic pendulum.
Last edited by Wildcatter264; 03/12/24. Reason: Added info
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