What kind of barrel are you shooting? Also, what twist rate? The Lake City stuff is, what, like 173gr.? Their Match Grade stuff is very good.
I have a Krieger Barrel on my Winchester .308 and I have well over 1,000 rounds through it with no visable signs of throat wear or any wear on the lands and grooves. I have no visions of needing to "replace" this barrel prior to after 5K rounds - but I will be replacing it early for a change to a Mike Rock 5R model - not do to anything other than personal preference and a "need" to try the Mike Rock reputation out for myself.