BSA,
Not looking for a fight, but I find it curious that you seem to complain about "heavy, hard kicking .300s", but you are pretty partial to the .338 WM. I realize the .338 is "more gun"than the .300, but it is not that much more, and it does rock you, I think a bit more.
I also suspect a .30-06 Fwt. with 200 to 220 grain bullets will get your attention, but it would be easier to pack around.
Comparing a .300 to a 9.3x62 is, to me, comparing two different things altogether. For me to pick one over the other, I would really have to look at the task at hand.
Full disclosure. My hunting rifles are a light .270, a standard weight .300, and I am building a Mauser in 9.3x62, because I always wanted a Mauser action rifle and 9.3x62 is a classic Mauser chambering.
Last edited by GunDoc7; 01/25/15.