Dave..i have used a couple of the weaver 1-3's; a couple of years ago Natchez had those on a special promo at about 1/2 price.
decent optics with fairly flat field of view...tracked well, very compact size, but seemed considerably more critical of head/eye position then the leupold 1.5-5x, or the 1-4x. but, it was a clear scope.
i used them on a couple of TC carbines where mounting position was more flexible & stock LOP was shorter compared to the #1....all in all, i'd pick a vari-x II 1-4x over the weaver 1-3x for that use.