Jeff, thank you for you service!
I can’t imagine your old 06 wouldn’t get it done. I’m partial to Barnes tsx/ttsx and might suggest one of those in 150-180 grains if you are concerned about your 180 Sierra. My mom took a 21” barreled 7/08 to Africa a few years ago with 140TTSX I loaded for her. It killed kudu, wildebeest, gemsbok and a very large zebra very handily. Good luck!
Ben
