What do you think the second bullet is going to do that the first one didn't? Other than mess up more meat. Dead is dead. If your first shot was a lethal shot then the deer will die, putting more bullets in it probably won't speed this up any.

I bow hunt as well, so I am used to making the first shot count then waiting to track the animal so I don't bump it and make it run farther. And when I gun hunt there really isn't time for a second shot. The deer either drops or runs and I don't have time to recover from the shot, aim and shoot before it's gone. I am better off taking the shot and watching the reaction of the animal and where it goes.

Besides both of my hunting guns are single shots anyway, an H&R ultra slug gun and a remington inline muzzle loader. I do have an A-5 smooth bore or a back up though.

Paul