Home Forums Hunting & Shooting Express Rifles and Big Bores Only Question for the .400 Whelen Crowd

As mentioned by HawkI, a .416-caliber neck expander works on necking up the noncylindrical brass like .35 Whelen R-P brass:





Velocity of that fireforming load (48.5 gr IMR-3031 with backwards 210-grainer) was a mere 1733 fps instrumental at 5 yards, 52 degrees F.
It could surely stand some hotting up to sharpen the shoulder better.

Below is Rusty McGee's use of .280 Remington R-P brass to make .400 Whelen by using Cream O' Wheat and pistol powder:
I don't do that and do not know his specifics of technique.