Semisane -
Like you I don't place much faith in groups of less than 5 shots. It just seems that my groups don't stop expanding 'till about that number of shots fired. I've thought there is probably a better way todetermine "honest" accuracyby using a formula to determine when enough shots have been taken. Maybe we shouldn't call a group a group until 2 shots have been fired wihtout expanding the previous pattern. So 3 shots inone hole would be a minimum required. That's pretty much why I end up taking 5 or 6 shots to make a "group".
As to how your groups stack up to other posts that are out there, I wouldn't worry too much about it. IMO the shooter is less than half the equation, maybe closer to 20%,when a scoped gun is double bagged on the bench. In the field, that changes to 80% shooter, 20% gun.
It is also difficult to compare results when a variety of twist rates and barrel qualities are involved. I'm convinced that most of the success I've enjoyed since going to a GM barrel is just that, the barrel.
Go put that 3 inch group on 150#'s of venison and celebrate your ability to execute when it matters.