I'm not an expert on them but I've had a number of them since the late 1960's. Every one I've owned shot well and functioned with out problems. All but a couple have been made in the 60's and 70's. I just don't see how you can go wrong in that time frame. Study them a little, decide what you want and hold out for one in good shape. There are plenty at good prices. Wish I could justify another one.