This year I'm using a 270 win with 130 gr fed trophy copper for moose. I think I would do a penatration test at the maximum distance I could possibly shoot accurately or for arguments sake let's just say 250 yards. Let's say 130 gr copper .277 vs 110 gr copper .277, in order to determine a couple things, now we know that velocity is key with light tough bullets
we know that a 130 gr .277 copper bullet driven to 3100 fps will do the job clean and fast out too about 250 yards after that the velocity loss makes for a slow kill on big game, let's say 600 lbs and up.
So now if we could get 110 gr. copper bullet moving along at 3500 fps or more. The question in my mind is, would this combination have more penatration then the proven load noted above? If the test proves yes then were on to something. Then we could start pushing the range out until the 110 grain bullet no longer has penatration as deep as the 130 at 250...
Another thing to consider would be the test medium; ballistic gelatin with bones in it, phone books, 7/16 osb, water jugs??? I don't know the right answer, just flippen random thoughts here on that one.
Not sure if these thoughts are way out in left field. Someone please feel free to run with the idea if they're not to far out there.
One last thought, bullet failure might be an issue at close range.
Anyway your post got me thinking. Good luck eh!