Depends on who you ask. Some will say that if you shoot a heavier load in practice you will be able to shoot your lighter match load more efficiently. This idea has some merit, although you would have to shoot the match load a little before a major match to make sure you are dialed into the timing on it and the sight settings. For myself, reloading can be a real chore when you have a busy lifestyle...as most of ous do....and for that reason I don't want to spend valuable reloading time changing over my press settings to a heavier bullet charge. Accordingly, I shoot in practice what I shoot in matches.