Scope worked fine for a while, but service is terrible - Nikon 4-12x40mm ProStaff Rifle Scopes - Waterproof Hunting Scope

I had this scope mounted for roughly 4 years on a 270 Winchester. It performed flawlessly for the previously mentioned time frame until I missed a relatively easy shot. I checked the zero and it failed to fire a moa shot group at 100 meters. Actually the shot group was creeping on 4 inches. I replaced this scope with an extra Vortex I had and we were back in business with a sub moa group again. I returned it to Nikon service and the circus act began. They allegedly repaired the scope and returned it in warranty. However the exact same thing occurred after it was remounted . I again contacted Nikon and we went through the same hat dance again. In my opinion these are decent scopes unless they malfunction. At that point save yourself the aggravation, time, ammunition, and trips to UPS because if you trust Nikon technical service for warranty repair you end up with nothing but an overpriced paper weight.