You are slightly off, but like I said, with the Wolf ammo, it wont make too much of a difference. Here's the notes from the Trijicon web site.
"The TA01, TA11, & TA31 (.223) were designed for the 5.56mm, 20 inch barrel, 55 grain bullet, and M16/AR15 carry handle mount. The TA01B & TA11C(.308) were designed for the 7.62mm, 20 inch barrel, 168 grain bullet, and M16/AR15 carry handle mount. The TA01NSN was designed specifically for the US Special Operations Command SOPMOD M4 Carbine. To meet their requirements, the reticle bullet drop compensator and range finding stadia lines were based on the trajectory of the 62 grain bullet from a 16 inch barrel, flattop mount (Picatinny rail Mil.Std.1913)."
TAO1 is designed for the carry handle of a 20" rifle using 55gr ammo (M193). This is not to say you cant use it on the flat top of a 16" or 20" rifle with good results (because you can). Im just pointing out that the info you had wasnt right so that others wont read it and believe it is correct..