My first turkey was killed with a regular 1100, 2 3/4 inch 1 1/2 ounce #5 lead and an X full choke. The distance was 29 yards. The bird fell over backwards, flopped twice and was dead on the spot. Your 1100 with 3" shells should do a fine job killing turkeys as long as you do 2 things. 1. Pattern your gun at 10 yards for POA/POI issues and correct any issues and 2. Pattern your gun at 40 yards, with your shell of choice, to determine your max range. Your gun, choke and shell combo should put 100 pellets in a 10 inch circle at 40 yards to be effective. Keep your questions coming and Welcome to Old Gobbler!