I was hoping to solicit insight into acceptable accuracy for double rifles. I would expect that the mid-bores like 9.3 or .375 should probably be held to a little higher standard given their potential for reaching out a littler farther than the large bores. I will soon have the pleasure of shooting a .458. I would expect that in most cases the larger bores are not used much beyond 50 yards and will thus pose my question at this mark.

What do you consider acceptable accuracy for a .458 at 50 yards. What is your personal preference for maximum horizontal and vertical spread?

Eric