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Gold/Mining/Energy : Gold Price Monitor

GDXJ 121.59

+2.2%

Dec 26 4:00 PM EST

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To: long-gone who wrote (86542)	6/6/2002 1:45:07 PM
From: E. Charters	Read Replies (1) of 116832

E=1/2 MV^2. BP - ML (black powder muzzle loader) V = velocity, it is squared. 1500 feet per second is 457 metres /sec .. squared is 209,036 Mass is 500 grains is 1.04 troy ounces or 32.39 grams. or .032399 kg's Energy is (.039399/2) 209036 = 3,386 That is in glooferdusses or somelike. ***** .223 modearn riffle shootin iron as in US military. **** 3200 feet per second. is 997.48 metres/second .. squared is 994,969.0 mass of bullet is 55 grains. or 3.56 grams or .00356393 kgs. over two is .00178 gks times above is 1,773 of them glooferdusses .. or kilograms metres/second squared Foot pounds is clearer for most folk who eat collared greens. 1800 Kentucky shootin iron. --> mass is difficult here. it must be divided by 32. 500 grains is 32.39 /28.349/16/32 got it? over 2 is That is .0001115 times 1500 squared = 2510 foot pounds. (Kentucky rifle) Whoppin. So how is our .223 calibre? 55 grains is 3.56/28.349/16/32 == .00024526 over 2 is .0001226 times muzzle velocity is 3200 fps squared is 10,240,000 ... is 1255** foot pounds (M16) So the modern M16 has half the muzzle energy of a standard black powder rifle of 1800. Tragicstory or bullet curve of old 1500 feet per second rifle was a lobber. But it carried well. It did not shoot well beyond 400 usually. Lets see. at 1500 fps start and 1100 at end. That is 1300 average. in one second a bullet falls S=1/2at^2 or distance = one half gravity acceleration times the time squared. So that is 16 times one or 16 feet. In 500 yards the bullet took about 1.15 seconds. Actually with tragicstory about 1.2 seconds. So 1.44 (1.2 squared) times 1/2 accel of gravity that is 23.04 feet fall. So you must be 11.523 feet high at 250 yards approx. That is .55 inches of rise on your back site in 36 inches of distance from the front site to backsite. The 223 goes from 3200 to let's say 1500 fps. That is 2350 average. That is .638 seconds. Closer to .701 on the curve. S=1/2aT^2 = .702 squared times 16 equals 7.88 feet fall in 500 yards. You have to aim 2.626 feet high. Or be that much higher at 250 yards. (You aim 7.88 feet high at 500.) The sighting plane is made to shoot .189 inches in 36 high. This is all theoretical because actually you shoot from below the sighting plane to above and the back part of the curve near the target is much steeper than the front part. So you have to aim different than I calculated. EC<:-}

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