Personally, I have none of these calibers..
However, since your after a shorter range, heavier caliber, I would stray from the .300 Ultra Uber Shootzen Boomer magnums. Why? Because if a shorter handy brush gun, you will lose more velocity anyways.
I would say a .338-06 or .35 Whelen fits the bill perfectly. If are going into open territory, the .270 gets the nod. But when your in the brush a big slow moving slug will be nice to have.
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