Did not last 70 rounds of .308 - Barska Weaver Style See-Through Quick Release Rings

As the title states, i only managed 70 rounds of .308 through my PTR before i went home to clean my rifle and found that the quick detach levers were no longer strong enough to hold onto the rails, and had minute amounts of wiggle room, which explains the point of aim mysteriously slightly deviating at the end of my range visit