so im sure we can all agree that these are the three dominant rifle rounds out there. but which one is best? what makes it the best? im not interested in the guns they're fired out of im only interested in your opinion of the round and for the ease of comparison lets just assume we're talking about semi auto performance cause I'll probably never own a class 3. things that made my decisions for me were weight, recoil, accuracy, cost and knockdown plus other little things. taking all of those things into consideration my vote goes for the .223 taking the cake and .308 coming in at number two and sorry to all you AK guys out there but the 7.62x39 rounds ruin a perfectly good rifle design... just my opinion what's yours?