Curious as to where you placed the O-ring. Did you locate the spot by dangling the barreled action and tapping it up and down with a small hammer to find the "dead spot" and place the O-ring there? (That's how I locate the spot at which to clamp the barrel sled on a couple .32-40 High Wall bench guns.)
"You can lead a man to logic, but you cannot make him think." Joe Harz
"Always certain, often right." Keith McCafferty
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