65K is perfectly safe in a modern bolt action for a .280 Rem just like the AI. I don't understand why you didn't use a matching 64K like you did the AI and WSM. This goes right back to mely earlier post about where I complained about cherry picking data.
The only reason Remington IMO didn't load the .280 to 65K like the .270 is because it would have ruined their wonder cartridge the 7mm RM. So you just proved my point all along the .280 AI isn't really better than a plain old .280 loaded like it should be. At 63K your only behind the .280 AI by 60 fps, so how is the AI actually an improvement over a properly loaded .280 Rem?
The only reason Remington IMO didn't load the .280 to 65K like the .270 is because it would have ruined their wonder cartridge the 7mm RM. So you just proved my point all along the .280 AI isn't really better than a plain old .280 loaded like it should be. At 63K your only behind the .280 AI by 60 fps, so how is the AI actually an improvement over a properly loaded .280 Rem?