I thought it might have something to do with my sight,

I can see the main outline of the kill zone on the target.But I can't see the inside areas,So I just try to put the pin in the center of the kill zone between the outlines,So I guess I am concentrating more on the smaller target.

So you may very well be right on this one,Even though I still need lots of work,Practice practice practice,I love the bow,It just feel more natural to me than a rifle,I don't know why,Well then again,I have always been drawn to the ancient weapons more than modern ones,I mean one of my favorite things to collect and train with are swords,And I guess maybe a bow is in a lot of ways still one of those weapons,Just updated for a more powerful modern style.Could be why it feels so natural to me...