Other than aesthetics & not being normal work practice, it is said that this rifling removal to steer the bullet may (I bet it does) unstabilize the projectile, you may not notice this on paper .

But if you were shooting large & dangerous game the projectile may wonder from a straight line of penetration, this is a very bad thing in dangerous game hunting !

This may be of no concern to you as this type of hunting has no interest to you ?

I think the 450NE 3 1/4 is the best in these rifles, for weight & power, 450/400 is good too with less recoil for the playing, but you can get a LOT of 45Cal projectile to play with & shoot sage squirrels.