I see what you're saying Paul. I don't have any experience shooting doves, although I have watched the ones near my house. And I can see that they are probably the hardest game bird to hit. I have hunted grouse in years past and they have the same nasty habit of changing direction and elevation in a heartbeat, so I know what you are dealing with. These are two birds that you probably could shoot behind and hit in some cases. They're just as likely to turn around and run into a pattern thrown behind them! So in cases like that and in shooting very long range and fast crossing targets I could see a very long lead. And like you said, if you slow your swing as you shoot, that distance could lessen without you noticing.
Most of my shotgunning is done in Sporting Clays which if set up right comes closest to hunting conditions. However, except for a few oddball trap set-ups and special clay birds, the trajectories stay the same although windy conditions can change them drastically. Although most shots are taken at birds thrown from traps set up so that the targets are angling away or toward the shooter, some are thrown at 90 degrees or near that and if thrown at high speed at 40 yds.+, a good bit of lead can be required. I have improved on my lead and follow-through, but I still tend to check my swing sometimes. And I tend at times to shoot over, not allowing for gravity pulling the target down.
There are times when checking your swing somewhat is necessary, at least for me it is. If you are shooting true pairs, especially fast ones, you have to get on that second bird fast and establish a lead. Which bird to shoot first depends on speed, rate of target drop and direction. Following pairs can be as bad sometimes. Report pairs give you a little more time but not much.
What would be interesting is to have a gun or head mounted video camera to record just how much lead we need and just where all those pellets are going. I believe that might help some shooters and I'm sure a lot of us would be surprised at what really goes on out there.
At least in shooting clays, one little piece knocked off makes for a dead bird. Unfortunately, that's not always the case when shooting game birds. I wish I was better but I don't get much opportunity anymore. Have a good'un! :grin: