No better round in the Whelen than 200gr. RN bullets, I've taken several whitetails with my Win. M/70 Super Grade Whelen rebore. It produces a big hole, leaves an easy to follow blood trail though most times its a DRT. Last buck the bullet penetrated diagonally thru the chest coming to rest under the skin of the far shoulder. Perfectly mushroomed it retained 66% of its original weight. The load was a Ken Waters Pet Load utilizing IMR 3031, the load produces 3 shot cloverleaf groups @ 100yds. and dead deer. It has been my go to load for many years now.
The load I use is from the Hornady Vol #2 manual an it is 51.1 grains of IMR 3031 with a Fed 210 primer. Velocity is 2385 FPS and has an energy of 2525 fp. I have used this load since 2007 but this time noticed a couple slightly flattened primers.