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No.
 

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Less wear on the barrel. If it starts having FTEs/FTC or slide lockback problems you can try a lighter spring or use standard ammo.
 

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:roll: God I wish you would destroy the word subsonic :?

If you're paying more for ammo that says SUBSONIC on it then you're getting ripped off, most 147 grain 9mm ammo is subsonic, meaning it doesn't go above a certain fps (dependent upon humidity, temp, etc, but usually somewhere in the vicinity of 1100fps).
 
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