The Benelli and other inertia operated semi-auto shotguns all give unreliable performance with light trap loads. The easiest solution is to just use 32 gram (1-1/8 ounce) loads. They are also very sensitive to body stance, you need to lean into them to get reliable functioning. Leaning back, light body weight, or less than a firm grip will all affect functioning. The large spring behind the bolt head can be replaced with a similar sized one but made from one gauge smaller wire for reliable light load performance but it needs to be changed back for heavier loads.
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