Re: 7mm Rem Mag and the SMK
Great looking rifle, the 7mm RM is probably my all time favorite cartridge as well. I've shot 30+ big game animals with it.
As far as shooting the 168SMK at a Red Stag, it will likely work, but I'd rather use a purpose built bullet. I use the SMK in my 338Allen Mag, but that SMK is 300gr's!
I shoot the 160gr Nosler Accubond in my 7mag, it is incredibly accurate (I've shot one hole groups at 200yds with it). I've shot it out to 800yds and stayed under 1/2 MOA. It should expand out to 900yds according to Exbal (1800fps is the expansion speed listed by Nosler).
I shoot it at 3015fps average using RL-22 and it's my go to/ do anything rifle.
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives