Free: Contests & Raffles.
My first thought was rem with that bolt but then I look at the rear and in thinking looks kinda spring field ish
Got to be some kind of custom with the Oberndorf bottom metal and tang safety. I’d say it’s some kind of Mauser from the bolt shroud but it looks like it doesn’t have the big claw extractor from what I can see in the photos.
It's kind of hard to "Somebody took a pair of calipers to the bore and said it measured .285", you really need a ball gauge.