Whelen.
In my case, it would be a 9.3x62 with a 250 AB.
I have a 7RM. Fantastic cartridge…if I’m going after cow elk, for sure the 7mm RM is perfect. But I have seen the penetration limitations of the 7mm in Africa personally (my trigger finger)…and based on that the Whelen would get my choice. Or, 9.3…
What I say now comes from my personal experience.
I have had two 35 Whelen's. My hunting partner had a 9,3x62. We are both long time experienced reloads and shooters. For quite a number of years, we would go to Utah every winter for a late season cow, antlerless elk hunt. The cows could get pretty big, and the land was open country. Off season we would, work up loads, go to the range, do all the math, all the things gun nuts do.
The 9,3 was, is and always will be a close to at best a barely medium range caliber.
What was the best of the best for medium bore was a 35 Whelen using Barnes 200 grain, TTSXBT bullet with a B.C. of .359 going 2,800 feet/sec. That was an honest 350 yard caliber. And even better with a turret dial ranging scope.
I recall watching a wrestling match ages ago between a larger, bigger, muscular but somewhat fat wrestler and a small but not small man, who was solid toned muscle and was much faster. There was no contest at all. The leaner, faster guy won easily.
Barnes bullets are the leaner, faster, more efficient killers, and do they kill well, even at distant ranges. The bugs have been worked out very well indeed.
Where did I end up after all these years, sold all my big calibers and now use on everything a Sako Finnlight with a tight 20 1/4" match grade barrel, shooting Barnes TTSXBT 168 grain bullets pushed by a max load of AA2520 going just under 2,900'/sec. Shoots sub-moa, does it all with a great BC. Deal done!