Savage believes that the new Impulse Hexlock 6 ball Straight-Pull action is strong enough for 300 WSM and recently added the 6.5 PRC, 300 PRC and 338 Lapua. All four of these cartridges use the Large Shank (1 1/8" -20 thread) barrels as used in some of the 110 rifles. However, the Impulse has these barrels thread into a steel barrel extension, which is bolted and pinned into the aluminum receiver. Bolt-heads are changeable, and the headspace is set between the Barrel extension and the barrel.

The 338 Lapua, 6.5PRC and 300 PRC are available in the Impulse Elite Precision Models, which use an MDT ACC Adjustable Core Competition chassis.

The 300 WSM is available in the Impulse Big Game Models.

Savage has a very strong action with the capability of changing cartridges with different barrel, extension and bolt-head trios. Headspace could remain preset for each trio.