Regarding magazine capacity with bolt guns in pig country: While pigs here generally all bolt when you shoot one, they will occasionally do like you mention and run around for a few seconds, sometimes coming back across a shooting lane to regroup with the herd. In those instances, you can often get another shot or two at walking pigs.
An odd thing that I've noticed is that I've gotten multiple kills from the same spot on dark and rainy days. Whack one, the herd runs off, only to come back out a few minutes later. They'll sometimes catch on after 2-3 get killed, only to ease off into the brush, sometimes appearing nearby on another shooting lane a bit later.
