 Another commercial cartridge that uses the 9.3×64mm Brenneke as parent cartridge is the .376 Steyr.This is essentially a shortened 9.3×64mm Brenneke cartridge necked-up to 9.5 mm (.375 in) calibre developed as an evolution of Jeff Cooper's "Super Scout" medium rifle concept, which was in turn an extension of his original scout rifle concept.With a higher felt recoil, the .376 Steyr is the largest practical cartridge for use in a short, lightweight weapon as the Steyr Scout rifle.