I would say it depends on what you are looking for in terms of results. The smith I use works with them and says they have been true. However, he had to check and it takes just as much time and skill (and therefore $) to set the action up and check for squareness of threads, bolt face, etc as it does to cut it true once it set up. So certain production gun actions may have a reputation for nice dimensions and workmanship, but it is not a good idea to have a $300-400 barrel installed on any action that hasn't been verified (i.e., trued before). Of course this doesn't apply to custom actions such as barnard, RPA, stolle, etc. I have owned 2 T3s and I will say that the action of the bolt is so smooth that I would not hesitate to have one rebarreled. You tend to really grow accustomed to them! As I recall the 300WM came with an 11" twist and the mag length kept you from seating close to the lands. Why not sell yours and get a T3 in 7mmRM? A 175 partition at 2950fps would be great for everything, plus there is extra room for seating depth! I believe there is only one action length for the T3.
