This reamer is one designed by German Salazar and produced by PT&G .Barrel is a 1-10 twist Krieger and 26” long . Since I will only be able to shoot 550 yds. I am going to load and shoot primarily 168’s and 175’s although I’m open to other options . I’d especially appreciate hearing from someone that is/has used this reamer as to how it’s working for you as well as powders that worked well. For me I have found that using Sierras accuracy load w/ VV550 exceptional in a 1-11.25 twist.