So have you chronographed your 150's at 3250 fps? Freebore or not, you're probably running higher pressure than you think if you're loading them that hot.
Folks who own and load Weatherby cartridges know that factory ballistics can easily be obtained, safely, using modern powders. Doesn't sound like you're in that group.
So I assume you're using pressure testing equipment, then? Just because a factory makes ammo, doesn't necessarily mean it's within the pressure ratings that I want to be running in my rifle, and just because you're not seeing traditional pressure signs, doesn't mean you're under 70k psi. Some Weatherby ammo sounds a lot like some WSM factory ammo.
