Well, just did the rate of twist on this barrel and it is 1:12 from the best I can tell using the method in the FAQ. Still not sure just what to do with this set, kind of got it for the action and stock, just can't decide if I want to spend the time tinkering with a wildcat, may have to send it to the bay, we'll see. Besides, if I want to get to the 4000 mark I'll do it with my 223, and I have, 40 gr barnes VLC's filled up with H335, this worked well in my #1.