Out of curiosity, what problem are you solving for using small calibers on large game? Is this for a small framed shooter or something else? I ask as I personally would not consider this proper, common practice or recommended by those with elk experience.
Honest question. Not trolling you.
Thanks
I think a better question to ask would be, what problem am I solving - or what advantages am I gaining - by using a larger caliber?
Assuming terminal and external ballistics are close enough to equally satisfactory either way, there is little compelling reason to use the larger round. Why would I accept more recoil, more weight, a larger platform, and more flash, blast, and noise just to get the same results?
As the smaller calibers' confidence of penetration and/or broadness of wounding and/or long range ballistics become increasingly less desirable for the task and target at hand, the appeal of the larger calibers increases, but you ought to think critically about the overall balance of factors before deciding upon what you believe to be the best rounded loading.
If you want to argue that the smaller caliber is not just suboptimal but outright
inadequate in the face of other evidence, then people are going to expect you to justify your position with something better than appeals to tradition, manliness, ft lbs energy, etc.
The other thing...many people who use larger calibers don't actually capitalize on their potential to begin with. There is frequently more difference
within a caliber than there is
between calibers. If you use a bullet in a larger caliber that is less terminally efficient than another design of projectile in a smaller caliber, then the latter may very well do similar or more damage and thus I have a hard time seeing the former as being something other than a waste.