Quote:
Originally Posted by Bushleague
IMO sectional density, along with a good number of other variables that we use as comparators between cartridges and bullets, are merely a complicated way of breaking very simple, common sense type concepts down into tables full of numbers so that gun nuts can obsess about this type of BS minutia.
SD, ft lbs, fps... they all more or less work as a rough general comparator when comparing apples to apples, but the more the cartridges and calibers being compared differ from each other, the more the numbers need to be taken with a grain of salt, rather than as scientific fact. Case in point, trying to compare 6.5mm and .224 cal terminal performance on big game by looking at an SD chart 
Just my opinion. |
I agree almost 100%
how do you tell if a new cartridge like say a .224 valkyrie launching a 90 gr bullet at 2700 fps might be enough to do some 2nd class game work or even possibly 3rd class?
comparing energy won't be a good idea, using s.d. and impact velocity will be the most accurate way to figure out if you can get to the offside hide compared to another more 'well known/proven' choice...