I have had one on my 20 ga shotgun for about 150 shoulder stinging slugs. No failure yet. But I have had scopes that needed occasional readjustments that can only be explained by the scope zero wandering. I have also dealt with scopes that just didn't work well. It would be easier to help if you explain your failure as there are other links in the chain that could cause innacuracy. As in loose bolts/screws, cracked/uneven rings, or even shooting a load that will never be accurate. Always start with checking your entire mounting system. Then try another load in the rifle if you haven't. Depending on twist rates you may need to try different bullet weights. If no improvement you need to try a scope that has been proven. You can even borrow a friends scope if needed. If everything checks out with those steps and you verify that that pst is a pos send it back to Vortex.
