I don't recall if it was Gun Digest or American Rifleman,but in the 60's/70's,articles were written about serious,controlled testing of "brush busting " cartridges.
The testing revealed that the popular,long held belief about roundnose "brush busting" woods cartridges was myth.Not true. I assume,from the handle "Std 7Mag",there is some 7mm mag experience. IMO(I can't prove it) I would think a 160 gr Nosler spitzer out of a tight twisted barrel from a 7 mm Rem mag MIGHT perform better in brush than a .450 S+W or a .444 or EVEN (gasp) a 45-70.
But it would still deflect if it hit a 3/8 dia branch.
IMO,the previous advice about being able to see a clear path to your target via optics and a precise rifle is good advice.
One more thing. "Shooting trough brush"..... I'm not accusing or disrespecting anyone...but lets think a minute.
A bullet flies "line of sight" Shooting "through brush" certainly might suggest we are shooting at something that is at least partially obscured from vision.
Sometimes when we"almost see" something,the mind and eyes have ways of filling in the blanks...so the image we see is the one we expect to see.I think the phenomenon is called "early blur"
I don't even want to need a "brush bucking" cartridge. I want nothing but clear air between me and my target. Filling my tag is not a matter of life and death. Being sure of my target IS.
There might be "hunter orange" requirements...for hunters. Non hunters can still be in the woods wearing brown Carharts.
Something to consider.