I just cannot understand why people are still worried about burning out a .264WM. People have this preconceived notion that .264WMs are fire-breathers with a limited time frame of shootability...yet NO ONE ever thinks twice about the .257 Weatherby (same case capacity and slightly smaller bore). Would it not be as bad or worse than the .264?
Shoot it, have fun, and IF you burn the barrel out, replace it and get back at it...then brag to your friends that you shot a rifle enough to actually burn one out cuz most people will never do it.
