HP, hollow deformation bullet, shot into the target body warhead will produce deformation and distortion, instantly in the target body to cause great damage against the soft target effect is the best, but because of the hollow design, armor-piercing performance is quite poor. Hollow design, armor-piercing performance is quite poor.
FMJ, which is often referred to as the full metal jacket bullet, generally speaking is an ordinary bullet, penetration and stopping effect is more balanced, between HP and AP.
AP, armor-piercing rounds, in the FO world, can ignore a portion of the opponent's DT value by firing this type of ammunition, that is, the armor-piercing effect, at the same time, the damage caused by AP rounds on soft targets is not as good as that caused by HP and FMJ, which is also in line with the real world. The reason why I put AP last is because I was happy to see the return of the DT concept in FONV.
Here's an example of the relationship between AP's damage and its penetration:
If you shoot a chunk of beef with both HP and AP, the HP is bound to leave a large chunk of rotting meat, while the AP is likely to just penetrate and leave a hole a little larger than the caliber of the self. So it is clear that in this case the damage caused by the HP is significantly greater than the AP, which is the advantage of the HP and disadvantage of the AP against soft targets. But another situation, we put this piece of beef in a thin steel plate behind the shooting, then the situation will be very different, shooting with HP bullets, bullets can not penetrate the thin steel plate, but also completely unable to thin steel plate behind the beef caused by the threat, but the AP may penetrate the steel plate, and the same steel plate behind the beef caused by damage, that is to say, in the case of ballistic level of protection, the AP may be able to In other words, with ballistic level protection, AP may be able to penetrate the protection and cause some damage, while HP will not be able to do anything at all.
The above example is very common in FO1 and FO2, a group of bandits with 10MM pistols to fight an enemy wearing PA, the result is likely to be that the PA did not suffer any damage and the bandits were all destroyed, but in FO3 there is no concept of DT, simply DR by percentage damage reduction, so a large group of 10MM pistols with the bandits as well as the protagonist wearing a T51B to beat the The first thing you need to do is to get your hands dirty. ....