I have a 22-250 Rem 700 with a Lilja barrel 26" 1 1/8 in diameter with a 1-14 twist. After 2300 rounds the throat was burnt out. The gunsmith cut off 3" and rechamber it. During the life of the barrel I was shooting mostly sub 1/2" 5 shot groups at 100 yds. Is it normal for a barrel to go after only this many rounds? The gunsmith said it is normal with a 22-250 wit the bullet going about 3200 fps. Would another barrel manufacturers barrel last longer, if so who?