Sunday GunDay: New Straight-Pull Savage Impulse Rifle

Savage Arms has just introduced the new Impulse series of straight-pull bolt rifles. This is the first American-designed and crafted straight-pull centerfire rifle. The new Impulse features an innovative Hexlock bolt-locking mechanism with six spherical bearings that move radially outward into a ring in the barrel extension, thereby locking the bolt in place. That barrel extension is held in the receiver assembly by four cross-bolts on the lower front section. Ahead of the barrel extension is a conventional recoil lug and a familiar Savage barrel nut.

Savage Impulse Straight-Pull Rifle — Overview

Savage claims the new system offers the cycling speed of a semi-auto, with the accuracy of a bolt-action. There have been some initial field tests, and it looks like the performance has been good. However, based on the videos that Savage has posted, the cycling of the Impulse’s straight-pull bolt does not seem to be as smooth as some European straight-pulls, such as the Blaser R8, Merkel RX Helix, and Strasser RS 14. We’ve tried those Austrian/German rifles and you really can cycle them very smoothly. From the video the Savage Impulse appears to require somewhat more muscle and effort. Watch below. The video will launch at the 15-second mark for a comparison between the Impulse and a conventional Savage bolt-action:

Savage Speed Comparison — Impulse vs. Regular Bolt Action

Savage says: “Conventional bolt-actions require four steps to cycle the bolt. Impulse simplifies the process with a simple back-and-forth motion.”

Advantages of Straight-Pull Cycling System
What is the advantage of a straight-pull system? You should be able to cycle faster, and (ideally) maintain your cheek-weld and target view. Savage says: “The smooth bolt throw allows a shooter to cycle rounds intuitively, without the need for the standard four changes-of-direction common to a conventional bolt’s path-of-travel. Impulse reduces split times and allows a shooter to manipulate the bolt without losing [his] cheek weld. The bolt travels out and back and shooters don’t have to take their eyes off the target.” Sounds good, but if you watch the above videos, it’s not as wonderful as claimed. That said, if one slows down a bit, a straight pull should allow the shooter to maintain his cheek weld.

Savage’s Impulse “will redefine the way you think about straight-pull rifles”, said Al Kasper, President/CEO of Savage Arms. These new Impulse rifles are built for speed — faster bolt cycling while maintaining ones cheek-weld. This increase in speed can help a hunter make effective follow-up shots.

Major Engineering Features of New Savage Impulse

Hexlock Bolt | Barrel Extension | 4-Bolt Barrel Clamp | Ambidextrous Rotary Bolt Handle

When the bolt is closed, the Hexlock system holds it in place instead of conventional lugs. With the Hexlock, six (6) hardened steel bearings lock the bolt in place inside the receiver’s barrel extension. Savage says “As pressure increases, Hexlock’s hold tightens, ensuring that there can be no rearward movement of the bolt. Once the round has left the barrel, the pressure subsides, and the action can safely open again with the straight pull of the bolt handle.”

Savage Impulse — Hexlock System (Bolt Locks in Barrel Extension)

The cleverly-designed, modular Impulse bolt can be disassembled without tools. And the bolt-handle can be moved to either side easily. NOTE: In this diagram it may appear that the barrel does not have threads on the chamber end. Actually, Impulse barrels DO have threads on that end, which are used by the barrel nut. However, these threads are covered by a barrel extension which is held in the action/receiver by a lower-side four-bolt barrel clamp.

To design and craft the Savage Impulse, Savage employed advanced engineering with computer modeling. Savage also uses advanced, computer-controlled machinery to build these rifles The video below shows the design/engineering process by which Savage brought the Impulse from concept to finished product in just two years — a very short time by firearms industry standards.

This Video Shows How the Savage Impulse Was Engineered

Savage Impulse — Ambidextrous, Adjustable Angle Bolt Handle

One of the key features of the new Savage Impulse is an ambidextrous bolt handle that can be quickly and easily moved from one side to the other. This allows Impulse rifles to work for both left-handed and right-handed shooters. In addition, the angle of the bolt handle can be adjusted by simply pushing a spring-loaded pin and removing a side coverpin. This is demonstrated in the video below.

Savage Impulse Models: Predator, Big Game, Hog Hunter

Savage currently offers three Impulse models, all equipped with Savage AccuStock, Accufit, and AccuTrigger. All Impulse actions feature a Picatinny rail on top along with a central safety. Because the bolt handle can be placed on either side, all Impulse rifles are essentially ambidextrous — good for lefties as well as righties. There are both short-action and long-action versions of the Impulse rifle. Seven different chamberings are offered, from .22-250 to .300 Win Magnum.

IMPULSE Predator: Varmint Rifle, medium contour 24″ barrel. AICS 10-rd detachable magazine. Available chamberings: .22-250 Rem, .243 Win, 6.5 Creedmoor, .308 Win.

IMPULSE Big Game: Primary Hunting Rifle, short- and long-action. Flush detachable magazine. Available chamberings: .243 Win, 6.5 Creedmoor, .308 Win, .300 WSM, .30-06 SPRG, .300 Win Magnum.

IMPULSE Hog Hunter: Hunting Rifle, heavy contour 24″ barrel. Flush 4-rd detachable magazine. Available chamberings: 6.5 Creedmoor, .308 Win, .30-06 SPRG, .300 Win Magnum.