I have a new (about 1000 rounds through it) Ruger GP100 .357 magnum, with the 4" barrel. I was cleaning it the other day and noticed there is about 1/8" of "play" in the extractor rod both out and in. In other words I can wiggle the extractor rod slightly forward before I push it back to extract my spent shells. Is this normal? If not, what's the fix? Thanks much to anyone who can answer this for me.