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I'm interested in purchasing a 6.03 mm tightbore for my Broxa but I've read that some tightbore barrels have a slightly 'belled' end, as the inner barrel squeezes through a tight space in the outer barrel near the muzzle on the broxa I was wondering if I would be able to fit a tightbore through there or is the belling just an adjustment of the boring process leaving the diameter of the inner barrel consistent on the outside?
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