I am getting ready to re-barrel my 22-250. The barrel that is on it is an Adams & Bennett F34 contour 1:14 twist. It never shot as well as I felt it should and I am pretty sure that the limiting factor is the barrel. I am will have a 26" Shilen 1:12 twist #4 contour barrel installed. I think the change in twist and upgrade in barrel quality will go a long way toward getting the accuracy edge I am after. However, one of the things I noticed about my first barrel was how long the chamber throat seemed to be. With 52g AMAX and 50g VMAX bullets, I was getting my best accuracy with a COAL of 2.435", with the actual length to the rifling being in the neighborhood of 2.5"( I don't remember exactly and don't have my notes in front of me. Somewhere between 2.475 and 2.515). While all of my rifles, regardless of caliber or chambering, have shot most accurately with quite a bit of jump to the rifling, the length to the rifling of my 22-250 always seemed to me like it was a bit excessive. Am I right that the chamber throat on my 22-250 is excessively long? If so, should I be looking for a different spec reamer or more care in machining the chamber?