I had one of these on my gun for years and it worked great on slow moving birds coming in for an unexpected first shot but if you got busted or missed trying to get onto a moving bird with a scope is tough. Also if the bird comes from a different side or odd angle of approach it can be difficult to get a good site picture on the scope to shoot. Plus once down on the scope you have one eye closed. I switched to a burris fastfire three red dot and it is great. You can hit moving targets with ease all you need to do is put the red dot on the target and shoot. You keep both eyes open which also helps with your field of view and can see if another bird or other object comes into frame not like being locked down on a scope with one eye closed.