Won't hold windage zero. - Weaver K-6 Classic 6x38mm Hunting Duplex Rifle Scope

I wanted a fixed power scope for my Ruger 77/357 brush gun and thought this would be the one. I had sighted the rifle in with open sights and was getting 2 inch groups at 50 yards. This scope would continually jump left and right. The elevation held fine, but was getting 4 and 5 inch five shot groups, sometimes worse. I fired over 100 rounds and it just wasn't working. I put a variable scope on and was getting sub 2 inch groups. It was definitely the scope windage creeping about. I returned this scope. I put a Nikon on. One gets what one pays for.