The fluting 'stiffens ' the barrel without adding the full weight of a full bull barrel , but as with most things in life that are an attempt to get the best of both its a compromise - the fluting will cause issues when the barrel heats up during an extended string of shots.
The fluting will cause the barrel to heat up unevenly and the will likely cause a shift in the poi - much the same as you get in a sporter / lightweight barrel from a cold barrel to a hot one.
The fluting is supposed to aid in faster cooling - increased surface area , but whether this is really effective is a moot point .
Overall if your primary purpose is stalking a decent quality fluted barrel should be an aid to improved accuracy , and occasional range use - don't shoot too fast