[2] In recent years, Remington, Winchester and Ruger have produced rifles in this caliber, and most major ammunition manufacturers now supply factory loads.

Performance data is often listed on the side of the ammunition box for those who wish to do an in-store comparison.

On average, Weatherby factory ammo is loaded to higher chamber pressures than Remington or Winchester magnum rounds.

The Remington round can be handloaded to equal pressures, and as a consequence, surpass the .300 Weatherby in power.

[4] The SAS captured a rifle chambered in .300 Weatherby Magnum during the Falklands War.