Uploaded July 2016 | Updated September 2026, 8 hours ago

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This is the second in a series attempting to push a projectile in excess of MACH 4 aka 4 times the speed of sound. In terms of feet per second MACH 4 is 4500fps. We are using a 30-06 savage axis and loading .224 bullets in a .308 caliber sabot.

Do NOT Under Any Circumstances Attempt This!