Original sentence: 270 Winchester, it had somewhat unspectacular sales; Remington renamed the cartridge in 1979, calling it the 7 mm Express in an attempt to increase sales.280 Remington the 7 x 64 has a slightly higher maximum allowed chamber pressure and as a European 7 mm cartridge has a slightly larger bore.280 Remington, also known as the 7 mm Express Remington, was introduced in 1957 for the Remington model 740, 760, 721 and 725 rifles.30-06 Springfield necked down to accept 7 mm (.American 7 mm cartridges have 7.21 mm (0.284 in) grooves Ø.European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter
Edited sentence: 270 Winchester, it had somewhat unspectacular sales; Remington renamed the cartridge in 1979, calling it the 7 mm Express in an attempt to increase sales.280 Remington the 7 x 64 has a slightly higher maximum allowed chamber pressure and as a European 7 mm cartridge has a slightly larger bore.280 Remington, also known as the 7 mm Express Remington, was introduced in 1957 for the Remington model 740, 760, 721 and 725 rifles.30-06 Springfield necked down to accept 7 mm (.American 7 mm cartridges have 7.21 mm (0.284 in) grooves Ø.European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter