I have a JP Barrell and it is far better than my shooting,spendy yes,but it's scary accurate.My buddy who helped me wind the thing together who is a navy vet and a gun freak,let me do all my own homework and he put it together.We went to shoot it and his 5 shot groups at 200 meters with the factory fioochi extrema hunting 50 grain vmax were 1/2 inch.Mine were anywhere from 1 inch to 3 inch because I suck.I haven't shot any match ammo through it yet but I do have a couple boxes of 69 grain and 77 grain.Just got to find the time to go and shoot some more at longer range.