You've received a lot of great advice. If you really want another 30 cal rifle that is different than your 300 Win Mag and 300 WSM, go up to the 300 RUM or drop down to a 30-06. Especially since you don't reload, a 26" barrel on a 30-06 would be pretty awesome and, in my opinion, I don't think there are any more versatile cartridges than the 30-06. You can go light or heavy and find ammo in any small town in the world.
Or.........get yourself set up to reload by selling off all the components you listed. I went down the reloading "rabbit hole" 6 years ago because I couldn't find the ammo my 300 WSM loved and I had an elk hunt coming up. It's fun and extremely satisfying to custom build your own ammo for your rifles