I hunted Naimbia twice with the 300RUM and it was excellent. On Zebra it dropped it within five feet with a 300 yd. shot with nosler partion in 02 and in 04 a 200yd. shot-it ran 10 ft. with a trophy bonded bear claw. My father in law killed one with the 300 RUM with a scirocco 150 grain with no problem. the 300 RUM for me has been excellent. kudu at 400 yd. water buck, zebra, eland even on a giraffe. All the best to you.