I never learned three round burst. I was always taught that when going full auto, be it M16 or cal 50 one should never start center of mass (COM) but rather start low and walk rounds up the body. In engaging a vehicle use a "Z" pattern and start low.
IMHO 3 rd burst in 5.56mm is the same as a single shot on target with 7.62x51 (.308). Which is more efficient? I personally don't like 7.62x39 (AK ammo) since a whole lot of the stuff available from overseas (savings is a factor here) is corrosive. Also, I don't own an AK and probably never will so for me the point is moot.
Good Point. Im the son of a Marine so I was taught as a kid to shoot and enjoy weapons. He also taught me that you should be able to hit what your aiming at. I only got a couple of 22s to play with b.c there cheap to fire. My dad has a M-1A that I shoot when im at home and compared to the M-16 it has a hell of a kick. Plus we eventually want to get a M1 Garand to shoot to.
I personally agree with you on the 7.62 Ammo, I remember hearing stuff from somolia where the 5.56 wasnt doing any damage b.c it was going too quick through the target and just leaving a empty hole. I remembered seeing that there was a M1 that was chambered for 10 rounds of 5.56 that was refused by Dougie MacArthur back during the 30s.
As for the AKs I was talking about from a quality overall, not the rounds. I remember seeing something about how you could drop them in the dust, pick them up and shake them off and they'll fire.
One of my old girlfriends father (he was an exarmy ranger) had a AR-16 that he created from parts Plus an SKS.