IF YOU CONTINUE TO SHOOT YOUR RIFLE WITH HOT BARRELS YOU CAN HAVE SERIOUS THROAT EROSION IN AS FEW AS 500 ROUNDS. IF YOU HAVE SHOT THIS RIFLE AS MUCH AS YOU SAY YOU HAVE 600 TO 2000 ROUNDS PER YEAR I' D SAY YOU'VE GOT YOUR MONEYS WORTH OUT OF THAT BARREL AND IT IS DEFINATELY TIME TO REBARREL.
I HAVE A CHRISTENSEN ARMS IN 300 WBY. IT IS A CARBON CUSTOM. THEY GUARANTEE .5 MOA. THEY ARE RIGHT OF THE FIRST 5 LOADS I CHECKED 3 OUT OF 5 WERE UNDER .5 WITH THE BEST BEING A .29 IN A 3 SHOT GROUP. VERY EXPENSIVE RIFLE THOUGH, STARTS AT 3200.
I LOVED IT SO MUCH I JUST HAD A GUN OF MINE...
I AGREE THAT THE VELOCITY MUST BE ABOUT 3012 TO ACHEIVE WHAT YOU SAID. IN ASSUMING THIS, 350 YARDS = -1.68 , 400= -6.99,450= -13.93, 500= -22.63, 550= -33.02, 600 = -45.62, 650= -60.43,700 = -77.3 AND 750 YDS = -97.08
HOPE THIS DATA HELPS AND IS NOT TOO LATE. YOU REALLY DO NEED A CHRONY ALL...