I have a Remington 700 in 280 Rem. Over the last year accuracy has been starting to fall off. This gun used to do 3 shots in one hole at 100 yds religously and now it's pretty close to the inch mark. I ordered some Wipeout after reading another post, should be here this week so that may help, but I'm pretty anal about keeping bores clean. I can't say for sure how many rounds through it but probably somewhere between 2,000-3,000, mostly 154 Hornady SP's at about 2850 fps. How many rounds do you expect out of a factory barrel?