I'm not certain what all Blackhawk has in mind but I would tend to agree with him. It isn't the sights. For any kind of long range accuracy the factory sights on both will have to be either changed or augmented. I suspect one of the reasons is the weight, especially if one is considering the rifle and not the carbine. The 86's are a fairly heavy rifle, heavier than the Marlin. Over a long string that weight soaks up a lot of recoil. If shooting from cross sticks it will also lay steadier. It would also hold steadier offhand....for a while. Then I believe the added weight might be a detriment. The 86 rifle will also have a longer barrel, thus a longer sight radius and the longer barrel could make it more friendly to a wider range of loads. It will be interesting to see what BH is thinking.