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High Speed vs lower speed cartridges.


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Old 12-11-2012, 03:43 AM   #11
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Remington Accelerator 30-06, driving a .25 caliber 55 grain bullet at 4500 fps. Acts like a hole punch.


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Old 12-11-2012, 04:16 AM   #12
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My AR with 55gr Federal 5.56 @ 50 yards yesterday shooting a hinged steel target. I didn't do that again!


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Old 12-11-2012, 04:17 AM   #13
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About 3/8 inches deep into the steel
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Old 12-12-2012, 07:49 AM   #14
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A lot of good info here!

The high velocity just simply translates into high energy, it seems. And that energy has got to be dissipated somehow. And if stopped too suddenly (steel target) - then radical stuff happens! That is pretty obvious by those videos. Those are amazing!
The metal looks as though it goes molten briefly just at the beginning of the strike! And that is a lot of energy being converted to heat - but I guess it has to convert to molten - the stop is so abrupt!

And this bounce back stuff is extreme!

The comments on the small caliber being more accurate than large caliber is interesting, too. Must be that large calibers are not as aerodynamically stable - and tend to tumble a bit - in flight.
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Old 12-12-2012, 08:53 AM   #15
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Quote:
Originally Posted by Colby View Post
A lot of good info here!

The high velocity just simply translates into high energy, it seems. And that energy has got to be dissipated somehow. And if stopped too suddenly (steel target) - then radical stuff happens! That is pretty obvious by those videos. Those are amazing!
The metal looks as though it goes molten briefly just at the beginning of the strike! And that is a lot of energy being converted to heat - but I guess it has to convert to molten - the stop is so abrupt!

And this bounce back stuff is extreme!

The comments on the small caliber being more accurate than large caliber is interesting, too. Must be that large calibers are not as aerodynamically stable - and tend to tumble a bit - in flight.
In a vacuum small caliber bullets are more accurate than a large bullet. Wind gives heavier bullets an advantage in a practical environment. Most 17 HMR rifles are extremely accurate. But it's not uncommon for the wind to blow the 17 HMR two inches at 100 yards. When I shoot a 180 grain bullet from a 30/06 the wind has be howling to move the bullet in 100 yards.
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Old 12-12-2012, 09:03 AM   #16
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Quote:
Originally Posted by John_Deer View Post
In a vacuum small caliber bullets are more accurate than a large bullet. Wind gives heavier bullets an advantage in a practical environment. Most 17 HMR rifles are extremely accurate. But it's not uncommon for the wind to blow the 17 HMR two inches at 100 yards. When I shoot a 180 grain bullet from a 30/06 the wind has be howling to move the bullet in 100 yards.
That puts another whole complicating aspect into the long range thing...
Thanks!
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Old 12-12-2012, 10:29 AM   #17
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You can shoot at steel plates alll you wont. The big 50 and bigger caliber muzzle loaders followed by the big bore black powder cartridges rifles killed every size of critter that is on the earth. Since smokless powder has ben used and bullet designed for much higher velocity to fit the varmint and big game we can now shoot critters at a longer rangs. A deer shot at 100 yards with a slow moving 50 caliber round ball is jest as dead as a deer shot at 100 yards with a 22-250 shooting a fast moving 60 grain bullet.
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Old 12-12-2012, 01:36 PM   #18
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Quote:
Originally Posted by Colby View Post
A lot of good info here!

The high velocity just simply translates into high energy, it seems. And that energy has got to be dissipated somehow. And if stopped too suddenly (steel target) - then radical stuff happens! That is pretty obvious by those videos. Those are amazing!
The metal looks as though it goes molten briefly just at the beginning of the strike! And that is a lot of energy being converted to heat - but I guess it has to convert to molten - the stop is so abrupt!

A
That is exactly what happens.

The depleted uranium sabot round from the 120 mm M1 Abrams main gun strikes with sufficient kinetic energy to melt armor plate and cause the sprewel to go into the tank, spraying everything inside with molten metal.
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Old 12-13-2012, 05:48 AM   #19
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A shooting accident happened today when a Military Tank was shot by a varmint hunter. The Tank was crossing a Prairie Dog town today in South Dakota when an up set hunter shot the Tank with a .220 Swift. There were no survivers.


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