I didn't start using TSS to kill them at distance. I went that route to save 4lbs and 2/3 recoil. The TSS simply gave me the same performance at any distance I could expect to shoot a Turkey as my A400 did with #5:

[Linked Image from live.staticflickr.com]

If shooting Turkeys at XX yards is the reason Turkey are in decline, sounds like a game managment issue vs shotshell issue.