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Old November 7, 2012, 08:21 PM   #6
Bart B.
Senior Member
Join Date: February 15, 2009
Posts: 6,318
Fellas, note that most factory ammo's tested in fixed barrels that don't move in recoil. Oft times, they are SAAMI spec'd for bore, groove and length dimensions. Those test barrels typically shoot a given factory load 50 to 75 fps faster than what the factory's rifles (with typically bigger bore and groove diameters) shoot them out at when hand held by consumers.
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