To address .338 Lapua Magnum ammunition length limitations of the AWM, Accuracy International has since developed the AX338 long range rifle as the AWM successor model. The bolt action of the AX338 is longer and wider than the AWM, and the internal magazine is lengthened, allowing the unimpaired use of .338 Lapua Magnum cartridges loaded to the C.I.P. (Permanent International Commission for the Proof of Firearms Portable) maximum allowed overall length of . Furthermore, the AX338 has a 238 mm (1:9.375 in) twist rate to adequately stabilize longer, heavier .338 caliber very-low-drag projectile designs that became more common in the 21st century.