Long range .303

[Brian Dick]

If the throat or leade is worn in with cordite ammo, I guarantee it won't perform with boat tail bullets. see numerous posts in the past here by myself and others on the subject.

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[Roadkingtrax]

If the throat or leade is worn in with cordite ammo, I guarantee it won't perform with boat tail bullets. see numerous posts in the past here by myself and others on the subject.

Brian...

In the absence of a throat gauge or some other measuring instrument, is there a ball-park way of identifying a cordite worn leade? Looking into the chamber end with adequate light at the muzzle, its fairly obvious to see how worn the rifling is...when compared to a barrel that is new. Goes without saying, but maybe shooting it with boat tails is the only practical way to really draw a conclusion on performance?