I set one up a few years ago with the one that came out with the 1:20 twist.the best I got to shoot in it was 110 gr pyro-select and a 225 HP power belt.Hunted with it one time and took a deer at 170 yds with it.
I got another one in trade first of the year that I need to set up and it has the 1:30 twist.Want to try some 200 xtps in it to see how they shoot.