Ive got an old 336 , love the gun . Its got a 1.5x5x32 on it , piece of junk tasco , but it has not given problems so Im leaveing it alone . Mine is sighted dead on for 100 yards , and I would not shoot past 150 with it . It has proven to be a reliabe , accurate gun for me . Ive taken quit a few hogs with it . It likes 150 grain winchesters .