There are a lot of variables to that question. Caliber, barell length, porting, hot load, rifle, pistol, shooter size, "pansy", "real man". Well you get my point. What may of may not be considered a real kicker to one, is to another. Personally I have never used more than two rings on a scope. I have pistol barrels in 45/70, 450 marlin 308, 444 marlin, etc. I have never lost a scope yet or had one slip. I mount my rings as far apart as I can and add an extra screw to the weaver style bases at the front. Works for me, KN