I choose "C" also.
I'd split the difference and go with a 7mm.
7mm-08, 284 Win, 7mm RSAUM, 7mm WSM if your looking for a short action.
If you don't mind a long action, 280 Rem, 280AI, 7mm Rem Mag, 28 Nosler, 7mm RUM.
All will still have over 1,500 ftlb of energy at 500 yards. Plus better BC & less recoil than a 30 caliber.
Pair a 7mm with some Nosler ABLR, or Hammers and you got a winner.
Are you looking for 7lbs with the can, or before the can?
I can never understand the want of a can on a hunting rifle. More weight added, unbalances the rifle.
Especially with the advancements in hearing protection available now.