Long a$$ read. I guess I missed the concrete facts. Yes Weatherby ammo is hotter, by about 10,000 lbs. At one point in my life I went through magnumitis and went through all the Win mags and moved on to the WBY magnums. I sold all but one German 300, super accurate. At one point I had 4 WBY's in 300, I reloaded and shot them all, I looked, as always, very closely at the cases after shooting, I also made sure a case fired in one gun would chamber in the others. This told me there was some pretty good QC in these 5. What I missed in reading 23 pages was fact, age of the gun in question or whom was it manufactured by? Was it an early one assembled in the USA, Germany, Japan or back in the USA. What caliber was it, are we sure the right cartridge was used. Are we sure it actually happened? I have shot many MK V's, I have owned many MK V's and do not fear them.
