RE: are you gonna?
I'll pass on the 358 as well. Aside from the fact that I don't have a need for that caliber yet, I think that there are better choices out there.
A co-worker has an old 358 lever action Savage. We were discussing what we might use if we ever tried our hands at elk hunting. Looking at the 358 balistics, I couldn't see what it had to offer over the 338 mag or the 375 H&H. With the 358 Winchester ammo available today, its anything but a flat shooter. Luckily I happened to have this handy from our e-mail exchange. Sorry if the tables are a little confusing, doesn't work as well as it did in Outlook.
358 Stats: 200 gr Super-X Silvertip
(50, 100, 200, 300, 400, 500 yards)
Velocity (fps) 2490 - 2171 1876 1610 1379 1194
Energy (ft. lbs.) 2753 - 2093 1563 1151 844 633
(50, 100, 150, 200, 250, 300 yards)
Short Trajectory (in.) +0.4 0.0 -2.2 -6.5 -13.3 -23.0
(100, 150, 200, 250, 300, 400, 500 yards)
Long Trajectory (in.) +1.5 0.0 -3.6 -9.7 -18.6 -47.2 -94.1
338 Mag stats: 200 gr Super-X PowerPoint
(50, 100, 200, 300, 400, 500 yards)
Velocity (fps) 2960 - 2658 2375 2110 1862 1635
Energy (ft. lbs.) 3890 - 3137 2505 1977 1539 1187
(50, 100, 150, 200, 250, 300 yards)
Short Trajectory (in.) +0.5 +0.9 0.0 -2.3 -6.1 -11.6
(100, 150, 200, 250, 300, 400, 500 yards)
Long Trajectory (in.) +2.0 +1.7 0.0 -3.2 -8.2 -24.3 -50.4
375 H&H stats: 270 gr Supreme Failsafe
(50, 100, 200, 300, 400, 500 yards)
Velocity (fps) 2670 - 2447 2234 2033 1842 1664
Energy (ft. lbs.) 4275 - 3590 2994 2478 2035 1662
(50, 100, 150, 200, 250, 300 yards)
Short Trajectory (in.) -0.1 0.0 -1.4 -4.3 -9.0 -15.6
(100, 150, 200, 250, 300, 400, 500 yards)
Long Trajectory (in.) +2.2 +1.9 0.0 -3.6 -9.1 -28.7 -54.5