Mac45 my Black Diamond is a 1 in 20" and on 3 shot groups at 100yds I range between 1 1/2" - 2", not exactly a tack driver but best thing I've come up with so far. Much like you I hunt an area where 200 yd shots are very possible so I wanted to stick with the 150gr charges as well to take full advantage of the .45. I have spoken with several people who have the Knight 45's with the 1 in 20" twist and from what I'm hearing their best results have been with Red Hots as well although the group sizes they indicated were smaller than I've been able to get.