I found some slugs that look really interesting to me. They're made by Gualandi and can be bought at midway usa. These slugs are 20 gauge slugs that are attached to a 12 guage wad and they have plastic petals around the slug to center it in the barrel. They should be the perfect size to put through a turkey choke. I'm thinking that a slug that'll go through my jellyhead might be useful to have on me while turkey hunting. You never know when a nice hog will walk by.
http://www.gualandi.it/ENG/p_30_gualbo.asp
http://www.midwayusa.com/viewproduct/?productnumber=779775