Your gun's predecessor the A303 takes that honour, though it's all hearsay and repeat of other's opinions. I wonder what specifically were the significant 'improvements' made to the A390 over the A303 action. I doubt there's anything truly significant. A 3" chamber is undesirable and unnecessary unless you 'have to' be using magnum load cartridges but it's good to know this causes no ill effects to reliability. You sound pleased with your purchase as I am with my 18 y/o A303 and, like you, I shoot better with it than any shotgun I've previously owned. Enjoy. Regards ... GeekOriginally Posted by Korium
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