MELONITE and slow bullets

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http://bulletin.accurateshooter.com/200 ... d-actions/

Real-world tests have shown that Melonite barrel treatment definitely reduces internal barrel friction. Joel notes that, after processing, barrels deliver 50 to 100 fps LESS velocity with the same load, a reliable indicator of reduced friction.

Can someone explane why with reduced friction a bullet will have a slower speed.When I treat a engine with molly the idle speed increases due to lower friction?

[eastern_hunter]

Have seen the phenomenon before in a different situation ... and took some time to figure it out.

We speculate that the reduced friction results in more rapid movement of the projectile through the throat and down the barrel ... resulting in a greater volume that the burning powder charge must fill in a given time thus reducing the pressure acting on the projectile. Lower pressure yields lower velocity.

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I can wrap my head around that thanks.

[Bendersquint]

Less friction means less pressure pushing the projectile.

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I wonder if the same would hold true if a explosive was used.