How can you tell what choke a 12GA Savage model 30F barrel has?
All guns should have the information stamped onto the barrel.
Most of the time it is near the action. Look on the barrel of your
shot gun and it should tell you the make, model, caliber (or in
your case with a shot gun) the gauge, for shot guns the size of
shell the gun takes, and finally the choke the shot gun has. If it
is a screw on choke it should saw on it.