Quote Originally Posted by ballisticboy View Post
Diabolos will only give you a one hole group at 40 yards if you have managed to find the correct batch number and there is no wind blowing. But if you are happy to use the ammunition equivalent of a Model T Ford in your gun, albeit a well made Model T Ford, then that is fine. Other people are not.
Well, when you find a slug that gives 40 yd one-hole groups out of any old barrel with any old twist rate at sub-12 fpe, do let us know.
Until then it's all rather hypothetical.