The 350 had me intrigued until I looked at the ballistics....
The 338 WinMag outperforms the 350 RemMag. Outperforms it bad. Neither touch the energy of the 375H&H at 100 yards.
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Well, that's not necessarily a bad thing. The .350 Rem Mag is basically a short, belted .35 Whelen that works in a short action. I don't own a .350 Rem Mag but I do own a .35 Whelen and a 9.3x62. I also own a .338 Win Mag and a .375 H&H. Yeah, I'm a medium bore junkie... <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
The .35 Whelen and the 9.3x62 pack some serious power but kick less and are more pleasant to shoot than my .338 and .375. The .35 Whelen and 9.3 won't reach out quite as far as the .338 and the .375 but they still pack some serious punch.
And frankly, I don't like to shoot at a big game animal much past 200 yards anyway. I simply don't get enough time to practice at the range so I'm not comfortable shooting much past 200 yds at game. 2400-2500 fps, like the .35 Whelen and 9.3x62 with their heavy bullets, will reach out to 200 or so yards without any problem.
There's absolutely nothing wrong with the .338 and .375; I really like mine. Both are great cartridges. But, I also like my .35 Whelen and 9.3x62. (The .350 Rem Mag would be very much the same thing.) To me, they're just a little more "user friendly" and pleasant to shoot than my .338 and .375.
My two cents....
-Bob F.