I have shot it (Mossberg 500) at the atterburry (spelling?) rifle range (shorter one) and it was within and inch or two of what I ws wanting to hit on like a 6 inch target...... with a solid slug. I thought that was pretty good just using the fatory rail sight. I am also pretty good though at controlling my breathing/trigger pull/heart beat firing...... With a 22 rifle I was quite a bit closer but that is easier becuase you don't have a mule kicking you in the arm haha.
you should be goog to go. i miss read thinking you were saying you guess its close enough without trying. sorry for preaching. i know alot of hunters go to walmart the day before season buy a gun and ammo and hunt the next morning and it drives me nuts.