#7x43mm

The following is a guest article written for TFB by reader Tim about his efforts with his friend Paul to recreate the historical .280 British (7x43mm) round developed for the EM-2 and FAL rifles during the early pre-NATO rifle trials of the late 1940s. Enjoy!

In January, just before the 2017 SHOT Show, I got the opportunity to travel to Cody Wyoming to visit the Cody Firearms Museum at the Buffalo Bill Center of the West, to see some of their rare firearms and bring photos of them to our readers.

Today on an extra special episode of Historical Intermediate Calibers, we’ll be taking a look at one of the most controversial experimental military rounds, one that many believe should have become the standard for the Western World at the beginning of the Cold War. That round is the .280 British, also known as the 7x43mm, and beginning in 1947 it competed head-to-head against the caliber that eventually became the 7.62 NATO in trials to become the standard infantry small arms caliber of the free world. The .280 British has, in the almost 70 years since its invention, become one of the great “might-have-beens” of the small arms ammunition world. Many small arms enthusiasts wonder how firearms history might have been changed if this brilliantly designed British 7mm round had been adopted by NATO instead of the overlarge and too-powerful US-designed 7.62mm.

DTIC is a wonderful resource for finding documents that are important records in firearms history. One such article, which we will be looking at today, entitled “A Comparison Test Between United Kingdom And United States Lightweight Rifles” documents the 1950 test between the .280 caliber EM-2 (Janson Rifle, later Rifle No. 9), .280 caliber FN automatic carbine (later FN FAL, after a caliber change to the American .30 Light Rifle cartridge), and .30 caliber T25 rifle.