358-378 Real Guns

The 357-378 Real Guns is essentially the 378 Weatherby necked down to accept a 0.358″ bullet, while retaining the double radius Weatherby shoulder. The original development was done in 2003 with a Ruger No.1, rebarreled for the cartridge and wired for strain gauge pressure checking.

I am aware of the situation with Australia’s Woodleigh Bullets. However, I have a supply of 310 grain bullets and they performed well.

Warning: Bullet selections are specific, and loads are not valid with substitutions of different bullets of the same weight. Variations in bullet length will alter net case capacity,  pressure and velocity. Primer selection is specific and primer types are not interchangeable. These are maximum loads in my firearms and may be excessive in others. All loads should be reduced by 5% as a starting point for development where cartridges have greater than 40 grains in capacity and 10% for cartridges with less than 40 grain capacity following safe handloading practices as represented in established mainstream reloading manuals. Presentation of these loads does not constitute a solicitation for their use, nor a recommendation.