I've been using a 7mm Mag on a regular basis for the last few years and always gotten excellent results from that cartridge. I have a few of the 7 mags. I've killed a bunch of deer with my Ruger M-77 in 7 mag.This year I used Winchester Supreme Ballistic Silvertips 150 grin it.It was apoor season compared to other years. Of the three deer I took not one of them even took a step,they dropped right in their tracks.There's nothing wrong with a 7 mag.It will do what it's supposed to do if the shooter does their part.
I also like a 270 Win and for deer size game a 7mm08.