I thought it might be a good choice since it was designed for the 16in barreled AR's
I'm guessing it wouldn't lose much velocity out of a 15 inch T/C, then.
Not enough to matter for hunting purposes.
Exactly.
It is boarder line with the NBT expansion velocity for hunting applications. This is a forum, you can do what ever you want. But like WVHM stated, I would choose something else.
JMHO