The AWM (Arctic Warfare Magnum) is a sniper rifle manufactured by Accuracy International. It is also known as the AWSM (Arctic Warfare Super Magnum), which typically denotes the .338 Lapua Magnum version.
with either:
.300 Winchester Magnum The .300 Winchester Magnum offers a flatter trajectory and a significant increase in wind resistance and supersonic range over the 7.62x51mm NATO cartridge.
OR The AWM in the .338 Lapua Magnum (8.6 x 70 mm) calibre was designed as a dedicated long range sniper rifle combining the manoeuvrability of rifles chambered in 7.62 x 51 mm NATO with the greater power and range of the .50 BMG cartridge.
OF NOTE:
Compared to most .50 calibre rifles, the AWSM offers considerably less rifle weight, recoil, muzzle flash, smoke and report. Although the .338 Lapua Magnum delivers less kinetic energy to the target compared with the .50 BMG, both cartridges have similar trajectories, resistance to wind drift and penetration, while the .338 Lapua Magnum unquestionably outperforms the 7.62 x 51 mm NATO, especially at ranges beyond 800 m. AWSM rifles in .338 Lapua Magnum can also be deployed against unarmoured hard targets, including armoured glass.
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There is another cool cartridge between the 338 Lupua Mag and the 50 BMG called the Xtreme Machining 338. Here is a table that shows the differences...
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