Carl N. Brown
Member
"Amazing what a 7mm bullet at medium velocity will do in the penetration department."
I recalled the old 1956 movie "The Sharkfighters" about development of a shark repellant; while Victor Mature was in the water with the sharks testing a shark repellant, a sailor armed with an M1 Carbine stood guard. At the time I would have preferred an M1 Garand in .30-06. I have since found out (thanks to Mythbusters) that a FMJ bullet at 2700 feet per second (.30-06) hitting water acts like it hit a concrete wall and fragments without penetrating much, but slower bullets hitting water hold together and penetrate deeper. The myth being tested was the claim that diving 3 feet underwater would protect you from a strafing aircraft (confirmed).
Also, Hatcher's Notebook gives penetartion in wood of .30-06 at various ranges; deepest penetration, as I recall, started at 200 yds when the bullet was slower and less likely to deform.
I recalled the old 1956 movie "The Sharkfighters" about development of a shark repellant; while Victor Mature was in the water with the sharks testing a shark repellant, a sailor armed with an M1 Carbine stood guard. At the time I would have preferred an M1 Garand in .30-06. I have since found out (thanks to Mythbusters) that a FMJ bullet at 2700 feet per second (.30-06) hitting water acts like it hit a concrete wall and fragments without penetrating much, but slower bullets hitting water hold together and penetrate deeper. The myth being tested was the claim that diving 3 feet underwater would protect you from a strafing aircraft (confirmed).
Also, Hatcher's Notebook gives penetartion in wood of .30-06 at various ranges; deepest penetration, as I recall, started at 200 yds when the bullet was slower and less likely to deform.