My SIL killed a nice 5pt Bull ,a few years back, using the HSM ammo 7mm RM/168 Berger. He had bought a used Tikka T3 Lite from a local guy because it was so lightweight. At that time, he and a friend would drop down in this huge but God-Awful deep canyon for elk. He got a pass through heart/lung shot around 250yds. That's only one example, but it worked. Many more guys seem to favor that 160 AB. Myself, I've killed more game with Barnes and NBTs than anything else, but they are not the only tool in the box! Have fun, don't get discouraged when you get tired/wet, that Bull could jump out when you least expect it!