Phil your assumption on the slower velocity on the TI action is sound and true. TI will expand with pressure. Hence pressure lost at the action hence slows the velocity of the bullet down the barrel as you well know. I personally have not played with a TI action. I have friends that have. I asked one of them yesterday anfter reading your post about what he has seen and he said the same. He suspects he is losing 100 fps because of it. He did say he would not own another one. Like you I believe Brux and Krieger barrels are tough to beat and are the most consistent from experience. I can chamber two B or K barrels with the same caliber and use the same reamer and set the same headspace even on different actions and they will both pressure out pretty much same point and the loads will end up almost the same. I personally have two 6mm CM's chamber exactly the same and two 7mm saums, same barrel but two different actions and shoot the same load in both. The saums are are in the same action.