Hi, new guy to the forums here, hope you don't mind me posting my two cents worth.
I hunt with a 308 and have dropped every deer I'v ever shot with it where it was standing.
A 12 ga. slug would definately drop any deer with the right shot, but will also tear up a good deal of the meat. I'd recomendthe 308 for a good clean kill.
Easiest way to do it would be to get a broadside view of the deer, follow the leg up into the shoulder, and shoot into the crease at the top of the shoulder. I've seen my brothers shoot deer dead on the spot, but have the bullet pass through with minimal damage and the deer takes off running not knowing its dead. Shooting it in its shoulder will knock it over it it kills it. It may start kicking once its down, but thats the nerves firing, same as a chicken with its head cut off. Since the deer is on its side and on the ground, its not going anywhere.
Another benifit to shooting in the shoulder is instead of a target the size of a golfball, you have a target area larger tehn a grapefruit. but I typicaly shoot at 60-85 yard distances while hunting, that may not matter as much at 20 yards
Good luck.
I hunt with a 308 and have dropped every deer I'v ever shot with it where it was standing.
A 12 ga. slug would definately drop any deer with the right shot, but will also tear up a good deal of the meat. I'd recomendthe 308 for a good clean kill.
Easiest way to do it would be to get a broadside view of the deer, follow the leg up into the shoulder, and shoot into the crease at the top of the shoulder. I've seen my brothers shoot deer dead on the spot, but have the bullet pass through with minimal damage and the deer takes off running not knowing its dead. Shooting it in its shoulder will knock it over it it kills it. It may start kicking once its down, but thats the nerves firing, same as a chicken with its head cut off. Since the deer is on its side and on the ground, its not going anywhere.
Another benifit to shooting in the shoulder is instead of a target the size of a golfball, you have a target area larger tehn a grapefruit. but I typicaly shoot at 60-85 yard distances while hunting, that may not matter as much at 20 yards
Good luck.