My present 14" 7 TCU barrel has had a throat like a giraffe since it was new but now has more freebore than it used to. Lost some of my records about a year ago to water damage so I can't be sure of how many rounds this thing has used up but I know it is in excess of 4000. Put 230 through it since Friday. Most rounds have been 139 grain bullets over H322 powder and just a bit below max cause that is what it likes. Still shoots the same groups as always with no adjustments to bullet seating depth but I just wonder how long it will be before I have to replace it. I went through 2 other barrels before I got this one that made me happy. So how long do you think I have or am I just being premature?