Aside from all the game I have shot in the US, I took a 30/06 to Namibia on my first African plains game hunt. I shot 33 animals on that trip, including small stuff like springbok, blesbok, impala, warthog; all the way up to big tough stuff like red hartebeest, oryx, blue wildebeest, kudu and zebra. Ranges were between 300 and 700 yards. I was shooting a Weatherby action with a Krieger barrel, topped with a 4.5 x14 Leupold w/ mildot. I used 180 grain Hornady Interbond bullets in Lapua cases on top of 55.5 grains of IMR-4350. I was getting 2805 fps, certainly no super-scorcher, but it grouped well, around .5-.6 MOA.
To make a long story short, it killed everything I pointed it at with authority. I took 10 springbok for meat with headshots between 300 and 575 yards. The red hartebeest I killed at 695-700 yards in a 15mph full-value crosswind. I only recovered 3 bullets on the trip, the rest were pass-throughs, including an big zebra shot through both shoulders at 320 yards. Don't let anyone tell you 30/06 is not an adequate caliber. Components are also easy on the budget.