A braked 300 Wby may feel somewhat like a non-braked 7mm Mag, though the actual experience can vary depending on the brake and rifle setup. It should be much more manageable than an unbraked 300 Wby, but the muzzle blast and noise could still be intense, especially without ear protection.
Retro...
If aesthetics are your priority and you don't mind potential maintenance, the 4140 with Cerakote should be fine, but if corrosion resistance is crucial, the 416 SS version is the better option.
Slope Game