Welcome fellow AZ member! I would stay away from the 350 mag, no ammo or brass available. The 9.3x62 has the best quality brass availability and should be devastating. I used to shoot elk with a Whelen, 338-06, 338 Fed, 338 RUM, 7 STW, and 300 mag. After downing a fat cow last fall with a 155 gr Scenar with excellent results, I'll be shooting elk 500 yards and under with a 308 Win. Going to try the 200 gr ELD-X at 2550 fps this year. That bullet was a hammer out of the 300 win mag at 2950 fps.
