I don't think you should be worried about excessive muzzle flip in most centerfire rifles (.243, .308, 7mm-08, 30-06 for example) the bullet is gone before you get the muzzle lifting.
Now this is where we disagree. If that were true then how would you get muzzle flip from a bipod off the hood of a truck?? I did state in an earlier post that there is less barrel time in a faster cartridge. But barrel time still exists.
We will just have to agree to disagree on this one. Tom.