Re: 270WSM 169.5grn Wildcat range test
I think you've still got some room to go yet in that case. Comparing your 270 WSM to a 7mm WSM on Hodgdon's website, with a 168 grain bullet and Retumbo, 66 grains was their starting load at 2757 fps. I know that these aren't the same cartridge, but a very similar reference. They did get 2900 fps with Retumbo and a 70 grain compressed load. Pressure was still relatively low for a WSM at 58,500 psi.
Some people are like Slinkies...not really good for anything, but you can't help but smile when you see one tumbling down the stairs.