While it's possible, I guess, to have "too much" crimp on a .44 mag., the first time one jumps the case and locks up your revolver, you will rethink the whole matter. On any jacketed .44 mag round, I apply a "firm" crimp into the cannulure . I don't really know any downside to doing so, and plenty of downside to not doing so. I wonder about "most forums" saying they don't resize revolver brass. If you don't resize the brass, it's obviously going to be too large to grip the bullet.