misfires on 12 guage Winchester 71/2 Lights|General Discussions & Questions|Forum|Winchester Collector

I recently attended the Ohio State shoot in Marengo, Ohio June of 2019. When I arrived I bought 2 flats of 71/2 lights and 1 flat of 8 lights. Over the week I had 9 shells out of the 7 1/2 that did not fire. The flat of 8s were ok. I found this to be disruptive to my shooting. I bought new shells for a reason, no worries. The Winchester rep at Marengo, Craig, was very helpful and when I called into Winchester when I got home I talked to Brandon, service dept, who was very helpful in arranging for me to send in the bad shells. Out of 20 boxes of shells 16 boxes had shells that did not fire. I have received compensation for these shells, but I am left wondering about the quality of future shell purchases. I was left to wonder, while at a shoot, as to whether this was an ammunition issue or a gun issue. I did purchase a flat of Federal papers while at the state shoot and had no problems. I would like to hear from Winchester    Quality Control Team as to what the problem was with the shells. My husband has shot Winchester ammo for clay shooting, duck hunting, pheasant hunting, and has reloaded with Winchester components for 40 yrs, and will continue to do so. We thank for making a product we have trusted for years.