RE: CVA and BPI max load recommendation
Years ago I had a similar email exchange with BPI about heavier bullets. Back then they told me that in magnum rated gunsbullets up to 550 grains were OK as long as the powder level did not exceed 100 grains. I've been shooting 460 conicals over 90 grains of 777 for years with no hint of a problem. I have also tested a sidelock barrel to much higher loadings than recommended with no apparent issues. While things can and do go wrong no matter who the manufacturer is, it is far more likely that operator error comes into play most of the time when something does go wrong. Be safe out there no mater what you decide to load.