I picked up a .260 Rem the other day and have intentions on turning it into a 6.5 WSM. I pulled it out of the stock this morning to pull the barrel and saw this on the bottom. No, I have no idea about the "TT2" stamped on it either. The best I can measure the deepest part of it is .012". Is this something I should be concerned about or will it be good to go ahead and build a 6.5 WSM off of it? Oh, the factory stock was not messed with in any way. I can only figure they had it in a different stock until they got rid of it. Any help would be appreciated because they say, it's all fun and games until someone gets an eye poked out.