You don't need a cannon to kill a turkey IF you call him up close (35 yds. or less), which is the whole point in turkey hunting-fooling the turkey. But you do need to know what your gun is doing by patterning it with several loads and shot sizes, especially to see where it centers the load. This is critical with any shotgun, but especially so with older sxs's.

A short mag.(1 1/2 oz.)is a pretty stout recoiling load in a 7 1/2 lb. sxs, probably in the neighborhood of 45-50 ft./lb. free recoil, but it isn't unmanageable when you're only going to shoot just one or thrice a season while hunting. Like I said before, the patterning session is where you start running from it.
JR


Be strong, be of good courage.
God bless America, long live the Republic.