Hello fellow Tar Heel and welcome to LRH. Lot's of good advice on this forum. I haven't read all the post in this thread but I have caused a few whitetails to become table fare.
This nice buck stepped out at 5 minutes past sundown at 400yds and was thunderstruck. He paused just long enough to look my way, with the safety off, 2MOA vertical line high on his shoulder, I tightened up on the Shilen trigger. When the 700P rocked, instantly the 162gn ELD-M spun him around 180* in the opposite direction, and there he lay. I watched him a few minutes through the Vortex Strike Eagle, took this pic and then gathered my stuff.
This is the first year I've used the 7Mag in a long while (they don't seem to be immune to it either
). Last season I started out using my .300WinMag, took a couple and then went to the .270Win. None required a follow up shot. I really can't tell a difference in speed and effectiveness of killing between these three. The .300 "pushes" more but all wear muzzle brakes. I know you said you don't like 'em but the way I figured it, I'm setting in a elevated box blind just looking for deer to step out. I don't need to hear 'em, so I wear earplugs all the time. Just me. (after owning a .500S&W, I don't mind ear protection at all)
If I could pick your rifle/caliber for whitetails it would be a Christensen Arms Ridgeline in 6.5-285Norma, .270Win, 280Ackley, 7Mag or .300WinMag, or Mesa LR in 6.5PRC, 7Mag or .300WinMag., or a Browning X-bolt Western Hunter LR in 6.5PRC, .270Win, 6.8Western, 280Ackley 7Mag or .300WinMag.