Befus, Had a horton for 6 years. What I found is the horton 20 or 22 inch bolts and 125 thunderheads worked good. What ever you do always make sure the bolt is at least 400 grams. Always keep the rails well lubed and string well waxed. I retired mine cause I needed one with a built in cranking unit. Good luck. Oh I dont reccommend shots over 25 yards.