I have a 452 American .17hmr too I bought it new recently, I got the yo Dave trigger set but didn't use it in the end as I felt the trigger even though a tough heavy it was perfect for hunting and I had no creep at all in the trigger. I use a sidewinder 30 4-16 can hit empty shotgun cartridge ends at 110 yards zeroed for that range as the average bullet speed was 6010FPS through my gun. Its almost too easy to shoot I noticed no kick at all, so little that my 8year old nephew was able to hit a Clay Pigeon right in the center at 100yards.