At $8 per shell, I'll keep shooting my 1 7/8oz. reloads of Nickle plated 5.5's at turkeys. Every turkey I've killed out to 55yds has been DRT and it costs me less than $1 to load myself.
I get that it's heavier than lead and you can up your pellet count, but I like to get them as close as I can, that's most of the fun of turkey callin! I just don't think the price is worth it!
Elk Country