[2] It was designed by Frank C. Barnes in March 1961 by shortening the .308 Winchester to 1.5 in (38 mm) and giving it a shoulder angle of 20° (α=40°) similar to the parent cartridge.

[citation needed] The first rifles commissioned for the developmental work by Barnes for the .308×1.5" cartridge were a Swedish Model 96 Mauser with a 1 in 12 (305 mm) twist built by Les Corbet and a Remington Rolling Block with a 1 in 10 (254 mm) twist built by P.O.

Due to the weights of the bullet and the performance of the cartridge, the 1 in 12 twist became the standard by consensus.

The .308×1.5" was one of the original short fat cartridge designs, having a length to width ratio of 3.17.

[citation needed] While the .30-30 Winchester has about a 16% greater capacity over the Barnes cartridge, the .30-30 has a SAAMI-recommended pressure limit of 42,000 psi (2,900 bar).