Tough to do on a DH as everything depends on the wood separating the opening lever from the forend iron. The lever only takes the slightest pull on it to get the forend off. Trying to figure where the problem is; the lever?, the flat steel lever spring?, the toggle that engages the barrel lug?, the barrel lug?
The forend locks well on the barrels and lug. You can't pull it off. But when shot the recoil causes it to disengage.
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