Which type of round is best for punching through armor?
Subcaliber sabot.
>>64692095yup
>>64692030Harpoon? Not sure how much they cost per shot without reusing them.
M855 projectile saboted in a 308.We SLAP now.
A laser beam. Unless it's ablative.
>>64692148>AblativeRocket propell a rodent there
6.5x25 CBJ
>>64692030Tungsten core>>64692095>>64692143Flechette rounds (so saboted) have been tried and they turned out to be shit.
>>64692217Have any data?I would not trust a level 4 plate to keep me safe from a 3500 fps steel projectile.
The armor piercing kind, specifically: >>64692095Max sectional energy behind a hard material with a pointy tip.Anybody know if the name of the game here is pure sectional energy, or if there is extra value in velocity? Say two bullets both have 50,000ft*lbs/in^2 of sectional energy but one is going 2000fps and the other is half the weight going 2828fps. Will their penetration characteristics be the same? Assume equal bullet material and nose shape. What about like 100fps (that’s one hundred) vs 5000fps? (2500x difference in bullet weight). And there’s a threshold of *something* beyond which everything becomes liquid and the physics changes, right?
>>64692292Buffman tested a cheapo Level IV years ago to stop M995 tungsten core at 3,500ft/s. Hesco 4400 rebranded by CATI, IIRC. Modern ESAPIs, REV. G onward, are rated for M995 at 3,400ft/s three times. My Level IV+ plates beat .30-06 M2AP, a much larger steel penetrator than M855, at over 3,500ft/s. M855 is only really good against thin steel armor like helmets, auto glass, and polyethylene. M193 beats it versus steel. You need a better overall penetrator like M855A1 or preferably M995 for ceramics. With ceramics, you need core mass on your side as well. Get a bigger tungsten core than the ceramic strike face can shatter.M2AP at 3,500ft/s will pierce MOST Level IV plates, along with ESAPI or even XSAPI. To reliably kill Level IV you want either M948 SLAP or a heavy tungsten penetrator like 7.62x54R 7N37.
>>64692890> M2AP at 3,500ft/s will pierce MOST Level IV platesIs there a standard for what constitutes level 4 armor? That it must withstand penetration by X bullet at Y velocity? It’s also wild that there exists armor one can wear that will protect them against m2ap at 3500 fucking fps.
>>64692931Level IV is one hit of .30-06 M2AP between 2,850-2,910ft/s after a drop test. Level III is six hits of 7.62x51mm M80 FMJ at 2,750ft/s +-30. IVs are not required to pass the III test.>armorThey're Protech 2230s. 7.5lb, rated for both IV and III requirements. Cop plate that was never sold to civs. Expired, but that doesn't matter if they're in good shape. A guy on gunbroker is selling them for $400 a set w/o shipping and fees.https://www.gunbroker.com/item/1139132598From Safariland / Protech:>The 2230 is, by far, the most advanced Type IV hard armor plate that we’ve ever developed.” said Dan McNeil, Category Director for PROTECH Tactical Armor. “During NIJ Compliance testing for V50 which requires 12 impacts of the .30 M2-AP, the independent lab didn’t get any penetrations even with velocities in excess of 600 ft/s above the top velocity of the Type IV Reference Velocity range for NIJ-06 Compliance Testing.”
>>64692210In fairly certain you just watched a recently uploaded YouTube video
Purchase .300 Weatherby rifle. Learn to reload M2AP pulled bullets at over 3,500ft/s and you can bust XSAPIs.
>>64692609Both momentum and energy are conserved quantities.So if you transfer the same energy at a higher velocity this means less momentum because the energy grows faster (squared) than momentum.What that means in practical terms idk, maybe relevant to spalling?>Will their penetration characteristics be the same? Assume equal bullet material and nose shape.The squaring strikes again. 10x the speed, same energy means 1/100th the mass. You can't maintain the same nose like that, something has to give.> And there’s a threshold of *something* beyond which everything becomes liquid and the physics changes, right?Yeah, there's a bunch of such transitions. At even higher energy levels the matter doesn't really interact mechanically anymore and mostly passes through while only shedding a fraction of its energy. But that's in the realm of particle accelerators, not guns.
>>64693025> 10x the speed, same energy means 1/100th the mass. You can't maintain the same nose like that, something has to give.The light bullet is just the ogive and a short bearing surface, the heavy bullet is the same thing but with an extremely long bearing surface. So there is no difference in the bullets from the perspective of the armor, other than mass and velocity.
>>64692030>Sharp>Narrow>Heavy (ideally)Basically an APFSDS dart if you can find that in a bullet.
>>64692030Why do the four rounds on the right have the piece of copper passing through the middle? Structural, presumably, but under what conditions would that be relevant?Also can someone explain the 8th round? It makes me think of a tandem warhead, but I can't imagine something like that would work with bullets
>>64693105> piece of copper passing through the middle?Those are tracers, half the bullet is wasted with the pyrotechnic mixture contained in a metallic insert.>8thThe meme 2 bullets per round, the US tested version with 2 and 3. AFAIK nobody uses it irl.
>>64693120Chinese have some wonky duplex 5.8mm and triplex 7.62x39mm was mall ninja ammo back in the 00s.
>>64692030>hard>massive>pointy>fast>small cross sectionThat's all there is to it. The type of plate isn't all that important if you get these right.>hard>pointy>small cross sectionAre all very easy. The trick is balancing mass vs. velocity. Very fast without enough mass won't work, unless it's a railgun or something stupid. Lost of mass without enough speed won't work either, unless it's a shot from a howitzer. For all of the real world shit between those extremes, balance is important.
>>64692030>Which type of round is best for punching through armor?Soft lead slug to the dick.
