Cartridge standards for the .375 Ruger were issued by SAAMI in June 2007. SAAMI recommends a 6 groove barrel having a bore Ø of and a groove Ø of with a groove width of . The recommended rate of twist is one revolution in . Recommended maximum pressure for the cartridge is . Currently Hornady and Double Tap manufacture ammunition for the .375 Ruger cartridge. The Hornady superformance ammunition drives a SP-RP bullet at and the DGS and DGX bullets at . The Double Tap achieves and with a 270 grain Barnes TSX from a 23" barrel Ruger 77 African. The .375 Ruger's slightly greater case capacity, and the "short fat" cartridge efficiency lead to increases in the neighborhood of 150 fps over the H&H cartridge. Their capabilities remain essentially comparable. Since 2015 O.F. Mossberg & Sons produced bolt-action rifles of the ″Patriot″ series chambered in .375 Ruger with different stock options. The .375 Ruger cartridge has functioned as the parent case for the .300 Precision Rifle Cartridge (.300 PRC), which is essentially a necked-down version of the .375 Ruger. The American ammunition manufacturer Hornady got the .300 Precision Rifle Cartridge SAAMI-standardized in 2018. The .375 Ruger cartridge case was used by Hornady as the basis for a new extra long range cartridge since it had the capability to operate with high chamber pressures which, combined with a neck and barrel throat optimized for loading relatively long and heavy .308 diameter very-low-drag bullets without the need to seat the bullets deeply recessed into the case result in adequate muzzle velocities from magnum sized bolt action rifles. Rifles chambered for the .300 Precision Rifle Cartridge must be capable of handling overall length cartridges. The .300 Ruger Compact Magnum or .300 RCM was designed in 2007 and uses a case designed by Hornady and Ruger based on the .375 Ruger cartridge. The case is of a rimless design having the base and rim diameter of which is the same diameter of the belt on belted magnum cases based on the .300 H&H Magnum and .375 H&H Magnum. This allows the cartridge to have a greater case capacity than a belted magnum case given cases of equal length. As Ruger intended the cartridge to be chambered in short length bolt-action rifles the case length was shortened to which is similar to the .308 Winchester case. Unlike Winchester Short Magnum cartridges, the Ruger Compact Magnums share the same diameter from case head to body.