I created a load just this summer for the 168 hunters. I only had about 70 left from a friends project, so I looked in the powder cabinet and grabbed the last of a can of pp4000. I know this stuff is long gone, it's why I figured I'd throw it at a combo that I didn't plan on keeping around. It shoots very well and plan to try it out this fall. Im not pushing it very hard, right around 2800fps with new Peterson brass in a savage ultralight 22". Very easy to get an accurate load.
I tend to only use copper with that rifle so I wanted to try something much softer and a bit heavier. The guy I loaded for originally swore by the Bergers with his 7RM for white tail and had stacked many up.
Staball 6.5 works amazing in the 280AI across several bullet weights also.