No long actions rule out the 257 Roberts for me. I have a 243, 25-06 and 6.5x55, pretty much the class your looking at. I'd think it would be the 260 Rem. The 243 gets left at 100gr bullets, the 257's at 120grs and the 260 goes right on up to 140ge bullets while starting where the 25's left off. While I'm not a heavy bullet fan, I like mid range weight bullets in standard cartridges. With the 260 you could use 120 gr bullets for antelope and deer, 129gr for large deer and 140gr for something larger. I'd compromise, 129gr for everything I would hunt with it.
