I had a 6 1/2" 610, and it was a real shooter from the get go, with .40s&w or 10mm, I sold it to a friend something else and he loves it, the 1st shot He ever took with it, nailed a javelina in south Texas at 50 yards. I sold it because A) I needed money, and as nice as it was, would not do anything my M29 or M57 would not do. I have sellers remorse from time to time when my friend tell's what he shot last week with it. But I do still have my Glock 20, and it is showing promise as I try different bullets and loads.