Like stated above this is going to be interesting and I bet my best skunk hide that someone gets their feelers hurt.
As much as I would like to inject that a 204 with a berger 70 grainer is perfect
I rarely shoot deer, so my input is elk only. I will truthfully say that 30 caliber magnums work for me. For long range hunting I like big heavy bullets for ballistic coeficient, and penetrating reasons I personally feel a 308 will work to 500 yards under ideal conditions.
Everyone likes something different. I hate muzzle brakes
, except on my 300RUM, which I feel is unshootable with accuracy without the brake.
I have killed elk with 7mm, 270, 264, 25,223, with the exception of the last two all will work, and bigger can be better.
Best of luck