North Fork 423

This bullet was designed for the 404 Jeffery and the 404 Dakota.  The rifle it was tested in was a Jeffery with a 26” barrel and there was no problem in reaching 2500fps at very reasonable pressures.  Even 2600fps would be possible but you would be loading to modern, high intensity, pressures (60,000psi+).  That sort of defeats the purpose of the stately old 404.  Muzzle velocities in the 2300 to 2400 range are far more comfortable and controllable.  Because there are no upper end, super magnums in this caliber, this bullet is constructed for more sedate velocities than the 416-370 bullet.  It is suitable for big bear, moose, and any African plains game, including Cape buffalo.  

CAUTION.  SLUG YOUR BARREL!  This bullet has a diameter of .4230.  DO NOT FIRE THIS BULLET IN ANY BORE THAT SLUGS LESS THAN .4220.  European bores can run from .419 to .421.  For Euro bores, you would be better off with a bullet that has a full lead core that will swage down to .419 without excessive pressures IF the cartridge is loaded to original factory ballistics of 2100 to 2200fps.      

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