Whatever is to hand and ready to go, but I gotta say I’ve never warmed to the .243 (still ownedafter 40 years) or 7 Mag. (Sold after 10 rounds). As a former gunsmith I got to shoot a lot of both calibers, and I still don’t like these two!
Hard to beat the .30-06, but I really like my .260 and .338wm also. I’ve a few in betweeners , also....
I am with you 100%, do not prefer the 243 or 7 mag.
I like my 222, 22-250, 6.5 Creed(long range playing), 7-08's(aka 270 short), 300 H&H, 338-06, 9.3x64, 375H&H and 404 Jeffery.
