Rifle cartridges are not the most effective mechanisms for producing high projectile speed. Other things work much better. The 120mm smoothbore main gun on the M-1 Abrams tank fires a depleted-uranium ...
Next to the original 5.56mm NATO/223, the 300 AAC Blackout (BLK for short) is the most popular chambering for the AR-15 platform, and, as a result, manufacturers now pump out a wide variety of 300 ...
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