Topic: Step back 50 Cal... (Read 4829 times)

ww2 did shit like that for anti-tank rifles.

the shit WORKS. flat out. the speed of the projectile and small diameter make for precision hits that exploit any seams in armor or treads, wheels, axles, maybe even the peep hole

Except by the end of the war it stopped working in most cases due to armor improvements. The PTRS-41 was a BA gun though.

5thgenlx · « **Reply #24 on:** April 24, 2009, 02:45:09 AM »

thats straight fucking ridiculous. jeebus

Burntrubber87 · « **Reply #25 on:** April 24, 2009, 03:43:48 AM »

DU bullets are no fucking joke. I never knew that uranium was pyrophoric, that it ignited when it came into contact with air when its shattered or fragmented. basically an exploding fireball travelling at 5 times the speed of sound, which can turn the inside of a tank into a fucking firestorm..not to mention the 20mm's big brother the 30mm DU that comes out of the GAU8 on the A10. Just for shits and giggles I plug the numbers into a muzzle energy calc for the 30mm..3250FPS/4650grain bullet= 109,054 ft/lbs of muzzle energy..God bless the USA..50BMG muzzle energy= 3000ftlbs. Not sure what the 20mm is but i'm sure its up there with the 30.

SgtB · « **Reply #26 on:** April 24, 2009, 04:33:12 AM »

The Apache shoots 20mm DU. It kills pretty much anything but a main battle tank. I imagine it's really expensive to feed that thing.

AWDstylez · « **Reply #27 on:** April 24, 2009, 09:02:59 AM »

Quote from: Burntrubber87 on April 24, 2009, 03:43:48 AM

DU bullets are no fucking joke. I never knew that uranium was pyrophoric, that it ignited when it came into contact with air when its shattered or fragmented. basically an exploding fireball travelling at 5 times the speed of sound, which can turn the inside of a tank into a fucking firestorm..not to mention the 20mm's big brother the 30mm DU that comes out of the GAU8 on the A10. Just for shits and giggles I plug the numbers into a muzzle energy calc for the 30mm..3250FPS/4650grain bullet= 109,054 ft/lbs of muzzle energy..God bless the USA..50BMG muzzle energy= 3000ftlbs. Not sure what the 20mm is but i'm sure its up there with the 30.

.50BMG muzzle energy is WAY over 3,000ft/lbs. Most high powered hunting rounds are in the 3,000ft/lbs range, some (.300 win/mag, 7mm rem/mag, etc) are closer to 4,000. 655gr bullet at 3,029fts, I get 13,342.8ft/lbs.

Now I find it ever harder to believe that video is real. 100,000+ft/lbs would dislocate your shoulder and sending it flying back into the woods.

Burntrubber87 · « **Reply #28 on:** April 24, 2009, 01:01:16 PM »

Quote from: AWDstylez on April 24, 2009, 09:02:59 AM

Quote from: Burntrubber87 on April 24, 2009, 03:43:48 AM
DU bullets are no fucking joke. I never knew that uranium was pyrophoric, that it ignited when it came into contact with air when its shattered or fragmented. basically an exploding fireball travelling at 5 times the speed of sound, which can turn the inside of a tank into a fucking firestorm..not to mention the 20mm's big brother the 30mm DU that comes out of the GAU8 on the A10. Just for shits and giggles I plug the numbers into a muzzle energy calc for the 30mm..3250FPS/4650grain bullet= 109,054 ft/lbs of muzzle energy..God bless the USA..50BMG muzzle energy= 3000ftlbs. Not sure what the 20mm is but i'm sure its up there with the 30.

.50BMG muzzle energy is WAY over 3,000ft/lbs. Most high powered hunting rounds are in the 3,000ft/lbs range, some (.300 win/mag, 7mm rem/mag, etc) are closer to 4,000. 655gr bullet at 3,029fts, I get 13,342.8ft/lbs.

Now I find it ever harder to believe that video is real. 100,000+ft/lbs would dislocate your shoulder and sending it flying back into the woods.

Well, the 100,000ft/lbs was the 30MM muzzle energy not the 20, I couldn't find any info on 20mm rounds i'm sure he wasn't shooting incendiary armor piercing rounds. He might have not even been shooting DU rounds. And I looked quick to find .50bmg muzzle energy and read it wrong...30-'06= 3000 ft/lbs. .50BMG=10,000-15,000ft/lbs. Also..apparently the 20mm Vulcan round has an electronic primer..

AWDstylez · « **Reply #29 on:** April 25, 2009, 09:00:19 AM »

Quote from: c0mpl3x on April 25, 2009, 01:02:25 AM

if the gun is designed properly, recoil can be moved to a down/forward direction to greatly lessen this. hence the back facing muzzle breaks

No, you can redirect the muzzle blast to negate some of the recoil, but the recoil itself is caused by that whole "equal and opposite reaction" thing... big, heavy bullet going forward really really fast, sends your ass backwards.

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Author Topic: Step back 50 Cal... (Read 4829 times)