Is this really necessary? I dunno but I went with it. So far, I've got 100 rounds Federal 115 gr. FMJ, 50 rounds American Eagle 115 FMJ, and 18 WWB 115 JHP with no problems. I think I'm done. I don't intend to use this as a range gun. I don't intend to run 500-1000 rounds through it. It goes bang when I squeeze and it hits where I point. Anymore is like pulling petals off a daisy. She loves me, she loves me not...