IMOO the only real advantage the 6.8 SPC or the grendal have over the rounds I mentioned is that they will fit in a AR mag. Carry weight is less but so what Im not taking any thing I build into battel and likely is 99.9% of the readers here. there is nothing a 6.5 grendal can do performanmce wise that a 260 remington cant do better. there is noting a 6.8 can do that a 7mm-08 cant do better. I see no reason the be restricted to AR limitations in a AK that dosent have to have them.
Id like to have a 6.5 grendal in a AK and the 6.8 is not a bad round I just feel the grendal is better. the gains that the 6.8 have at close range arnt treally going to make much of a differance n the real world as your dead or wonded both ways but at 450 yardsthe 6.5 will have a much larger advantage and even more so a 600. i dont know much about war and combate but I do know that if I could see the enemy id like to be able to shoot at them. and the grendal has the advantage. Im a hunter to i want the extra horse power of a longer round and i dont care what the weight differance is. I car how much it costs to shoot and reload and how accurate it is.