For the .260 Remington chambering a non-traditional 203 mm (1 in 8 inch) or 31.2 calibres right-hand twist rate optimised to stabilise longer, heavier very-low-drag bullets was selected over the standard 229 mm (1 in 9 inch) or 35.2 calibres twist rate. The TRG-22 can be ordered cambered for the .260 Remington cartridge as of May 2011. The introduction of the .260 Remington (6.5×51mm) chambering does not introduce major technical changes for the TRG system since the .260 Remington is essentially a necked down 6.5 mm (.264 in) variant of the .308 Winchester (7.62×51mm) cartridge, meaning these cartridges can be used in .308 Winchester chambered rifles only requiring different barrels.