MosinNOUGAT this is about your 3rd post asking about survival rifles. Now unlike the forum rules I do enjoy the odd hypothetical discussion of the perfect zombie gun as lighthearted entertainment. Assuming that's not what your getting at in your posts I feel the need to point out there is more than likely no solid answer to your question.
As others have tried to point out, multiple times, the term "survival" is simply too broad to provide an answer to.
Go to any decently size gun store and look at the myriad of pistols, rifles, and shotguns and see my point proven out. All of those guns and calibers were built for a reason. Now granted some of those reasons might be fun at the range so no practical survival purpose. No gun is a do it all wonder-kin that will make all other firearms obsolete.
If your looking to survive in an urban environment after a disaster a 45-70 or similar cartridge would not be ideal. However if you were dropped into the middle of nowhere Alaska I would much rather have said 45-70 rather than a 9mm carbine an urban environment might call for.
As I said before no gun solves all problems so the best gun for a survival situation simply does not exist. Now a survival situation in such and such environment is maybe a bit easier to get to the heart of. I would suggest, again as others have pointed out, that the best rifle in a given situation is what you have on hand that your proficient with and you can source ammo for. Now that may or may not be the perfect rifle for a given situation, but its the best available for said situation so any other discussion becomes a moot point.
So unless you have a trip planned that will force you to rely on your rifle for survival (in which case please provide details) then take what you have/like/feel comfortable with and shoot the snot out of it till you feel comfortable with it and stop worrying about what ever anyone else suggests is the best rifle for a hypothetical situation.