I started shooting indoor 3D league last winter and I can tell you that it has helped be drastically. I became more consistent. I am not the type of shooter that always aims for the 12 ring also. I am as if I was going to try and take animal. The 12 ring is not always in the best kill spot in my opinion, so I get alot of 8's and 10's, but I always look at it as if I made a good shoot. Other thing that helped me was being around other shooter and the staff at the pro shop, they all helped with things I was doing wrong or things that would help me be a better shooter and it has so far.
Given our year round good weather out here, they pretty much do everything outside. There is one club right down the road from me that has 3-D competitions every month. I have a free pass to shoot there, but for some reason, always keep putting it off. Probably should make it out there one of these days.
Others have offered up a sighting of roughly 2 inches high at 100 yards as a good sighting scheme. In my own experience I have come to favor a sighting of 3.5 inches high at 100 yards. This allows for the individual to hold dead-on (directly in the middle of the top and bottom) the animal out to roughly 350 yards.
Magnum calibers such as the 7mm Remington and 300 Winchester will extend this slightly. At 400 yards I hold directly on the backbone of the animal. The drop at this range allows the...