Nailed it there - for whatever reason that batch of components are not achieving the listed speeds. 'Max' is what the factory lists for the rifle using factory ammo , within a few percent should be achievable or to put another way you should be able to duplicate the factory specs with handloading. If you can't - why? That's the issue I have with my .308 - 20" barrel which is fairly standard for a .308 yet seems to be almost 300fps slow whatever I feed it.
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