[dolph]

my son just had a model 60 jc higgins giving to him from his grandfather ,it has a choke master on it.
I know nothing about it.it does have adjustable settings on it.
gyl+slug 20 yards , imp cyl 25 yards , mod. 35 yards , imp mod.45 yards , full.55 yards , extra full. 65 yards .it seems to be in good shape and the choke turns so it seems to be functional.
he wants to use this gun for turkeys, can anyone throw me some suggestions on where to set the choke , he will be using 2 3/4 winchester copper plated lead turkey 1 1/2 oz 4 shot. or if its even safe to use them ?
or any more info on this gun , its in decent shape. semi auto .