Yah George, I did 2 12 lb. turkeys on the roti last year and they both came out great. The Onegrill is more than enough, I'm pretty sure it can handle a 16 lb. one...the only issue you may have if you do a 16 pounder is the size of the bird since the C doesn't have the deep firebox, the clearance of the bird and the bars (and maybe even burners) may be really close.