The cartridge's inherent accuracy was a carry over from the .222 Remington which already had a loyal following in benchrest shooting fraternity.
As a testament to the 6×45mm's accuracy, Jim Stekl, who at that time managed Remington's custom shop and developer of the .22 BR cartridge, scored an aggregate record of .3069 inches (7.80 mm) in the 1973 IBS 200 yard Sporter category.
The availability of .223 cases, the ease of forming, and the light powder charge make for a very affordable shooting cartridge.
Many countries and many U.S. states require a minimum of .24 caliber (6.1 mm) for hunting certain game species, such as deer.
In such countries and states the 6×45mm would be legal for hunting as long as no further requirement regarding power, energy, or case length is stipulated.
In North America it is capable of taking small predator species such as bobcats, coyotes and foxes.
For example, in the Netherlands, rifle calibers in 6mm are allowed for roe deer if they retain a kinetic energy of at least 980 Joule at 100 meters.
[8](Dutch) An improved version of the cartridge called the 6 mm TCU was developed for metallic silhouette shooting.
A light weight (2,65 kg / 5 lbs 13,5oz), miniature action, barrel swap rifle system.