Shooting of bags, bipod or bench the vertical grip has a more comfortable feel and offers better/more consistent trigger pull. It allows you to pull the trigger in line with the bolt.
One other type of grip that took me a long time to like, is the thumb hole. It has a vertical grip
but with the thumb hole forcing you to have a very consistent trigger hand position. Before Laminates, the wood stocks had a very small thumb hole (For strength) and if you had gloves on it was almost un usable.
The Pistol/standard grip is more natural to most when shooting out of position but when pulling the trigger, the trigger finger is on a slight angle to the bolt making it less consistent (This can loosen groups if you don't shoot a lot).
So it is a matter of what you like and expect from a rifle and what it's use is. Regardless which grip you chose, practice is the key to getting use to it. the best grip will be the one that fits and is the most natural feeling.
J E CUSTOM