I'm the new owner of a 416 Ruger. As such I've been thinking of Why? a bit more lately. Just recently my wife killed a brown bear at 20 yrds with a 25-06 shooting 120g nosler partitions. Two shots, first was high shoulder with bone inmpact, complete pass, second heart, pass. So what I've observed is at close range it seems to me that a properly constructed bullet beeing propelled at speed with sufficient rotation imparts alot of energy very quickly into game. Not the same kind of energy transfer for frangible bullets just to clarify that bullet choice is important in this discussion. Would the 416 kill better, I can't imagine.
So now that I've got this big bore. I'm considering what kind of energy trasnfer I'm looking at. The term sectional density seems to come up often. What does that mean? Will I get more penetration over a broader range? Will I have a higher energy transfer?
I also want to load it up with 300g bullets, the lightest I can find and optimize this caliber for long range alpine pursuits. Has anyone loaded it with 300g Nosler Partitions and worked up balistics here?