I am guessing that there is a bedding problem, or as above. However in my experience, in general, horizontal dispertion is bedding and vertical is ignition. Wind would have to be VERY gusty to make a 4x1" "group". I had a MkII that was a bitch to single load w/out using the mag in a 204. It was my coyote truck gun and I sold it for that very feeding problem. Went back to my #3 Swift. You might try a single shot follower ala "Score High" brand or make your own, its easy (1/4 inch thick plastic using flat and rat tail files).-Muddy
