I am interested in a Ruger model# 707 Service Six. I have seen pictures of it & going to see it tomorrow afternoon. My question is this are these square butt or round butt. Did they come in both or one way. Reason is this one has a hogue grip on it now. Hard to tell what it is from picture. I would like to change it to original if I like it. Shop Ruger has grips on sale very cheap & they are for square butt grips.