Model 70, I have just the ticket for your Brush Gun!
How about a British .303 jungle carbine? I have one and it is the "Cat's Meow" for the brush country.
If that doesn't suit your fancy, then a wore out model 70 with a new .338 caliber or .358 caliber barrel attached and your go to go, it don't get anybetter. Just keep that barrel length to 22 inches. I am affraid any shorter and you will have to much muzzle blast, if you run close to Max handloads in the rifle.