During deer season here in New England the weather is ever changing, sunny in the morning and drizzling rain or snow in the afternoon. It is wise to choose a rifle that is somewhat impervious to moisture and that includes the barrel and things attached to it. My Ruger African .375 Ruger is blued but not highly weather/rust resistant by the factory so I use bowling lane wax everywhere on the wood and barrel before going afield. Let it dry and it has little odor.

I hear that a hunting guide in Alaska paints his barrels. It works but must be a bit ugly! Of course there is stainless steel but as a new rifle, manufacturers offer spray on rust resistant coatings such as Cerakote, https://www.cerakote.com/project-gallery?tab=color

Or for example my Weatherby Rifle barrel with Weathershield coating. This website, Haus of Arms has this video on the difference between stainless and weathershield on Thompson Center rifles. I Own two rifles with weathershield coatings. I love them both for weather resistance. Easy to care for and no rust.

Just remember that the intricate parts in your guns action are likely not coated so you must take care for these parts as well. I use a dry lube (not stinky) that has a solvent to get the oil where you need it and then coats to protect the surface.

I hear that Otis has a nice dry lube created for the military. Remington offers a dry lube too!  Check them out! I use the Remington Dry Lube with Teflon! Very cost effective!

On waxes there are car waxes that work to repel rust and moisture from wood and steel and my bowling ball wax as well as commercial gun waxes by Birchwood Casey.

Hope this helps!

Good Hunting!