Not looking for a caliber can of worms but..... I am building a home built AR-15 platform. Look to mostly do some target shooting with it and maybe a little hunting (deer and feral hogs). I am looking at two possible uppers, either a 5.56 or a 300 blackout. Looks like the price on the uppers is comparable and the ammo runs about .50 per for 5.56 and about $1 per for the 300 blackout. So which way would YOU go? And Why?