Originally Posted by cakesterkiller
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?
you cannot discuss those rounds in their usefulness without discussing the firearms that utilize them. its just not possible to get a complete understanding without doing so.
traditionally the limiting factor of using a 308 for cqb has been the weight recoil and flash from using it in a shorter barrel. with the advent of things like the scar17 in a sbr config and utilizing a good shorty type supressor that ca handle the excess gasses its a doable round for that role.
the 7.62x39 isnt a good cqb round because there just isnt a good ak type gun that effectively eliminates or reduces its recoil and muzzle jump. while it can be suppressed great lengths must be jumped through to get a concentricly threaded barrel with the right threads to fit suppressors. the 7.62x39 was designed to fight a midrange conflict across the open fields and forests of europe and eastern russia. its a round thats time passed 30 years ago but remains popular because its a fun round chambered in a cheap fun gun. think mosin 91/30. even the russkies are phasing it out in favor of the 7.62x54r and 5.45.
the ar15 fulfills the cqb role excessivly well but it too falls flat on extended range engagements
the main reason no armies field a 308 is because its only really good for longer range dmr/sniping roles altho socom is using the scar17 in 308 which does all three cqb/midrange/longrange very well.
those rounds dont exist in a vaccuum