im not saying that im just saying you get better with using the same gun more than you would with using a different gun every month. This is what ive been told.
Different markers will have different dropp off. Like how egos lob balls it will drop in a different place than say a dm. It will only really make a difference when you first try to lane somebody right off break. But after a game you should be used to its flight pattern and it won't matter after that.