The benefit of this design is that, with every shot, the same amount of gas is taken in to cycle the bolt, whether you’re shooting light target loads or heavy magnum loads. Savage says this leads to fast and consistent cycling. With loads under 1,000 fps, the system uses all the gas to run the bolt, which means no excess gas is vented. With loads over 1,000 fps, the valves release any excess gas. This system is not user adjustable by design. The Renegauge will run any load you feed it, without any need to adjust the D.R.I.V. system, says Savage engineers.