Operator luck! Nice shooting though. There are so many variables. See if you can repeat it. My eyes are full of floaters and fuzzy one minute then pretty sharp a while later.
VERY nice, Mike. Looks to be under 1 1/2".As to groups larger at a closer distance - it happens. Sometimes it's just due to the bull/sight relationship. Generally the smallest aiming spot that canbe seen sharply, over the sights, the tighter the group.Shooting tighter at longer ranges happens, I think, with bullet firing guns due to the rifling twist and distance it takes for the bullet to "go to sleep" moreoften than with round balls, thus I would suggest it is an "aiming thing".
Is that off hand? Boy if it is, you sure can hold steady! Either way that is really good shooting. That rifle is dialed inSpecs on that honey?
Mike - I suggest a 4" round bull for shooting at 50yards, with open sights. That is what I used to do my best shooting at that range.This one:http://www.targetz.com/targetzlib/10098.pdf