I'm not a big group shooter, but maybe somebody can explain to me why ten shot groups are necessary.
If my AR is for hunting and I don't ever plan on shooting more than five shots at a time, why would I care what a ten shot group looks like? If five shots are ALWAYS in a group that's acceptable to me at the ranges I shoot at, why would it bother me that ten shot groups are too big?
It seems akin to saying a rifle isn't accurate unless it shoots well at 500 yards, when the hunter only ever hunts at 75 yards.
For reference, my deer rifle holds four rounds-so I shoot four shot groups. But have been told that my four shot groups aren't acceptable because they're short one round.