Thanks it has an O'donell head on it and when I took apart I didn't remember it having the 2 shims I put the head on it about 4 years ago . I was going to use a dynamite platinum .28 xp but it is too nuts so I'm going back to old reliable . It's going to be RB or nothing for me never had a prob with any of my RB's I don't know what the hell I was thinking .