I left it up to the guy which way he wanted me to teach him, to wingshoot or to action shoot, when this came up. He wants to learn both, but thinks it's going to be easier for him to learn ONE way to shoot long guns for his 3gun matches, so he's planning to only practice the action rifle style.

For all intensive purposes, the two shooting styles are basically the same. Most action shooting "Guru's" teach a wingshooting type stance and target acquisition technique for both rifle and shotgun. However, nothing I've read or heard really points out the upper body mechanics for action shotgunning...everything I have learned about action rifle shooting suggests the same close forehand and 90degree raised shooting elbow over a wingshooter lower body, which works very well for me and keeps my natural point of aim at least on the same vertical level as my targets... it has also always worked for me for shotguns, but shaving milli-seconds is always important in these games, so I'll change ANYTHING if it's necessary.

I've never taught anyone how to shoot specifically action sports before (although pistol classes aren't too different)...especially never action shotgun, I'd hate to teach this guy something that's going to cost him time when he doesn't know any better.