You missed the point, we are not comparing the sights on what you are calling a bench rest rifle versus those on a hunting or target longrifle.The sights on a bench rest rifle are a lot higher off the barrel so they don't have to be over the rifle to line up with the sights. With the much lower open sights on an offhand rifle ...
The original poster was asking about the difference between shooting a longrifle from a bench versus shooting the SAME rifle offhand … two entirely different questions … reading is fundamental, LOL!