False security if you come across the right load https://www.full30.com/video/bb4bb9aff53dc8d0be5718c7982bf55b
Love the SR-15. A mate of mine brings that to the range all the time. Not only does it work quite well, but it works well filthy.
Whoa, great video. Conventional wisdom has been that a big heavy hollow point had the most stopping power. Now I am beginning to question that. That 50 grain hollow point tore a big hole in the clay. After it had penetrated the Class IIIA armor like it wasn't even there. Some of the comments were negative on the ammo as a carry round, but even if you traded off a little stopping power, wouldn't the ability to defeat armor carry the day?
Well, Kinetic Energy = 1/2 MV^2. Which has greater impact.... mass or velocity? IOW... bigger bullet or faster speed? (You can PM me if you don't want to be embarrassed by not knowing the answer.)
You get an "atta boy". Which is why the 5.56mm, .223 caliber, AR15/16 round (dubbed "The Meat Axe" during the Vietnam war) has such devastating impact... small mass @ 55-62gr, but 3200 fps.... tiny hole going in. BIG damage after.... similar to the video's "small mass but high velocity" round. There are pros and cons... trade-offs ... for every type of round and every use. You have to make an educated guess as to how you might use/need a particular round in a given situation. (Which is why I prefer a 9mm-.45 cal carbine for home defense... that's my personal "educated guess".) That said.... "anything you have" in a crisis... is better than nothing. IOW... maybe you wish you had a .308. Maybe what you actually have is a .410 with bird shot load. Go with what you have and hope for the best.
I understand physics but I'm not sure it's that simple. Otherwise the most popular .45 round would not be 230 grain. One reason that heavier rifle loads are preferred is they pack more punch at a distance. The bullet will lose quite a bit of velocity over a couple hundred yards or more. It still weighs the same though. Distance is not a real factor in home defense. Ability to defeat body armor could be crucial however.
if by impact - you mean affect - then it depends on the bullet (fmj / hp/ ball/ frag/ etc) if by impact you mean wallop - then mass wins Too much velocity - bullet will go clean through and not slow em down Again..., depends on bullet type One thing to consider long and hard on..., all; For home defense - when (not if) you miss - that bullet goes somewhere - could be through an interior wall / could be an exterior wall..., could be a window...., bullet could wind up ricocheting Who / what is on the other side of that wall / window...., or at the end of a ricochet God help you if it an innocent person - albeit it a loved one..., friend..., neighbor..., or passer by ================ The right weapon - is the one in trained hands RN
Increasing kinetic energy always has a greater impact than the mass of an object. Take a telephone pole sized cylinder and fire it from space. Get it to move at 20,000 miles per hour and it'll destroy a large town. There was some work done on that type of weapon a while back, can't remember where it went. Rail guns are pretty much designed entirely with this idea (using electromagnetism to achieve velocity).