Ok here is what im looking to build in the near future (once i get the cash). I want to build a 22-250 with 1000+ yard capability. USMC-03 and i briefly discussed building this rifle in this post and I talked about the performance of just a standard 22-250 Remington 700 rifle at 800 yards. (fun but i want more performance and i know the 22-250 is capable i just need the right platform) http://www.thefirearmsforum.com/showthread.php?t=58363 USMC-03 also posted a great sight where I found the barrel was looking for http://www.pac-nor.com/ I already know most of the stuff im set on and its going to be a McMillan A5 with Harris bipod and a Bushnell 6500 Elite 4.5-30x50 (I would like a Shmidt & Bender but that's out of my price range) all on a remington 700 action with a Timney trigger. The things I am uncertain on for my gun is what barrel would be best suited for the 22-250. What i do know is its going to be a fluted bull barrel 1.25" in diameter. My question is what is the optimum configuration for bullets weighing between 70-90 gr? I need to know Length (between 26"-30") which twist is better 1/7" or 1/8" and i need to know how many grooves will give me the best accuracy 4 or 5? Also what would be the maximum velocity i could safely fire a 70-90gr bullet using the 22-250 cartrage? Any suggestions will be greatly appreciated. Thank you. (if i put this post in the wrong one please move it to the proper section. I meant to put it in the technical questions section) Sorry my bad!