whether the gun is choked or not is quite important to the type of load you use.. if it is choked you can use powder/nitro card /two lubed felt wads/ shot /over shot card..(bend the nitro card to get by choke..... if it is not choked ive gotten best results with powder/nitro card/1/2 inch fibre wad (with large glob of tc yellow lube, bore butter, in the tube on the bottom)/shot/ over shot card.. track of the wolf or ballistic products, or precision reloading has all the components except powder... put any of these names in your search enging and they will pop up... sxs can be dangerous if you mix up your load, measure the length of ramrod sticking out of barrel after each loading by looking at the number of fingers it covers on your hand.... reseat the load on the other barrel after a single shot, i usually remove the live cap to do this.. .. if you take a shot or two and the load works down barrel from recoil it can be dangerous.. 72 grains of shot in standard black powder measure is one ounce.. 72 times 1.25 is or 90 grains on a powder measure is 1 1/4 ounce lead shot.. pack the powder and wads not the shot for best patterns.. . number 6 magnum shot should be good for turkey.. get a turkey target and pattern, pattern and pattern.. the rule of the thumb is that if it will give you a killing pattern on paper, and pennetrate one side of a campell soup can that will be sufficient for a good hunting/ killing load at that range.. if you need more shot in the pattern you can go smaller to get a killing pattern at that yardage.. then shoot the can.. if it wont pennetrate youll need to get closer or get larger shot.. adjust this back and fourth and you will get your maximum range.. when you take your stand be aware of your kill circumference in your shooting lanes and wait for the turkey to be inside that.. ....preassures will rise in hot weather drop in cold weather so some adjustments can be made but it takes charts to do this well.............larger shot, less powder, harder shot, choke, more shot will make patterns tighter........ in my 16 gauge 42 inch non choked smoothbore the best patterns are shot with 72 grains powder, 1 1/4 ounce shot... id start with 2fg until youv shot for a while, as faster powders, 3fg, can be unforgiving if you make a mistake.. have fun.. dave