If there are two of you, you should always keep the caller back at least 50yds, and when you see that bull in site, start using the cow call more and start rustling branches(without him seeing you) and breaking branches to imitate a bull challenging him and then that bull will think that there is another bull wanting to fight or is about to do his business with one of his cows and that makes them mad and they should come running right in but if they still hold up then yes go to them.