The .223 Rem (M16 rifle round) is fast. It shoots a 55 or so grain bullet at about 3300 feet/sec, give or take. It's the fastest of all these rounds (except one).
When you move up to the .30 caliber rounds, the bullets jump up in weight to 160-200 grains. Speeds run from about 2600 to 3000 fps or so.
The .338 Lapua is the king of the sniper rifles these days and shoots a 350 grain bullet at 2800 fps or so. They kill bad guys at over a mile with that one.
The .50 BMG is really big. Everyone who picks one up thinks it's some sort of fake, unless they know big ammo. It's really huge with a bullet that weighs 750 grains and goes as fast the Lapua.
The bullet for the 30x173 GAU-8 Avenger (Gun to which the A-10 Warthog is built around)has an aluminum jacket around a spent uranium core and weighs 6560 grains (yes, over 100 times as heavy as the M16 bullet, and flies through the air at 3500 fps (which is faster than the M16 as well). The gun shoots at a rate of 4200 rounds per minute. Yes, four thousand. Pilots typically shoot either one- or two-second burst which set loose 70 to 150 rounds. The system is optimized for shooting at 4,000 feet. Each of those seven barrels is 112" long. That's almost ten feet. The entire gun is 19-1/2 feet long.
Glad it’s on our side…..If you don’t agree, perhaps you could ask the 12 Iraqi armored divisions that encountered it?? Oh…that’s right you can’t …………they’re dead
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