There seem to be as many definitions of accuracy as there are internet experts, there are guys who think a rifle is only as accurate as it's largest or smallest group, some take the average. Some hold groups in complete contempt and only will accept multiple single shots at small dots or measure the accuracy as how far your cold bore is from point of aim not the size of a group, while others measure it in minute of hillside.
As a gun builder, hand loader and shooter I want to know as much as I can. It's not hard to get out and shoot a rifle enough to establish what represents the rifles best capability with the least amount of influence from the shooter, this for me becomes the base line that I'm striving for every time. Do I feed the rifle something it pukes up on, yes but I don't count that against the rifle but the loader, do I miss a cold bore wind call, heck ya but I don't count that to the rifle just the shooter. If you count everything to the rifle how then can you as a loader, shooter or gun builder find the room for improvement in yourself?
Some of the best shooting I've ever witnessed was done buy guys who would not get caught dead at the firing line of a BR comp but that does not make them or their rifle inferior.
The 6.5 Sherman is an out standing chambering and despite being on an old M70 action the thing shoots and shoots easy