The very simplest way to upgrade the bolt chamber complex is to change the geometry of the bolt handle; the bolt handle must have enough mass to it that it expedites the cycling of the bolt sufficiently quickly to feed a round onto the ramp and not break the rifleman's natural point of aim or target eye scope relief [TE/SR[ hn he is feeding from the magazine or single round. This bolt handle allows just for that; it is heavy enough that with simple snapping action of the wrist this can be achieved without ever taking the eye from the rear optic with a very silky smooth quickness that is effortless. The handle is easily installed even if the instructions are not followed particularly well. I have a heavy 1-1/2" oak dowel rod at my bench to depress the guide way bolt button on the Savage 110bolt and reset the firing pin spring. Ten minutes should do in the entire procedure. This "DOES NOT" take a gunsmith; any competent Rifleman who knows his weapon should be able to accomplish wi...