ST Curdog,
As suggested above, go shoot some 10 shot groups. The two touching with one out will probably turn into a uniform cloud at 10 shots.
Alternately, from a statistically standpoint the best tool for identifying your overall level of variance with the fewest shots is 2, 5 shots groups.
If you are going to use 3 shot groups you need at least 3 preferable 5 CONSECUTIVE groups to give a decent statistical results. That doesn't mean shoot 5 groups and take the best, but all groups need to be considered together in context as a single body of work....or you are just fooling yourself.
