If it's a 50's, it's a probably a Model 12 although some M97's were made into the 50s. 97's have the external hammer. There are TSS loads for the 16. Contact Hawglips for shot and load info. Gaswamp shoots a 16 for turkeys and he doesn't shoot TSS. Hopefully he will provide info. Modified would require patterning with the load to determine maximum range which is usually less than what full choke would do. If you are going to shoot lead, don't be tempted to shoot large shot. Pattern density is important. #7.5 lead has sufficient penetration under 35 yards and will most likely provide enough density to guarantee a lethal shot to the CNS. You will hear anecdotal "Golden Pellet" accounts of larger shot doing the job, but be aware that the pattern density might be such you will wound and not recover the bird if you don't pay attention to pattern density and range. A good rule of thumb is approximately 100 shot inside a 10" ring wherever that distance is. There are 78 square inches inside that circle and if you have a 100, you are more than likely going to hit brain or spine. Gil
Be careful shooting TSS in that old gun if it has a fix choke that stuff is HARD and mite bulge the barrel.Yeah, Just checked with my dad. I believe its a 50's - 60's pump. Modified choke. I keep seeing all this talk about TSS would that be worth looking into? Seem's odd that they don't make a 16 load specifically for turkeys.
A cold, windy January 2014 morning dove hunt with my older Britt Abby. She had more sense than I did getting out of the wind. 1957 M12 16 gauge, 28" modified.