Having heard the of the rave reviews on the x-caliber barrels I am interested in a 22-250AI. I have sent an email to them and am waiting for a reply on their offerings of chambers. I am wanting an 8 or 9 twist chambered to shoot 55gr to 75gr bullets. I don't want to turn necks but want it as tight as possible w/o turning. Has anybody bought an x-caliber direct or are you guys buying from vendors that are doing the chambering?