Jewell Is awesome but can take on more dirt and dust and not function. I used mine to hunt and tac matches and everything. Never had it not fire, but would get gritty so I cleaned it. Have a timney on my "Harder" use rifle and works great. Had it at 1.5 pounds but most matches have a restriction or if I moving I want it a little heavier. I have it at 2 and its breaks nice and clean. Both are great, and if you maintain the jewell your fine. By maintain I mean clean it everyonce in a while. I was pretty hard on it but still had it set at 2-2.3 lbs.