To give you an idea of what kind of energy you need to penetrate modern armor in the SARP:
The
LAWS is a system that uses 7 x 15 mm steel jacketed tungsten darts (that's regular ball ammo for a Service Rifle). As you can see, it can throw that dart pretty fucking fast -- up to 6,000 m/s, and that setting is usually employed by only the Sniper Rifle.
I didn't put in a weight for those darts, which I'm kicking myself for now that I'm doing this exercise. But I imagined them being around 350 grains, so we'll round up to 355 to make it an even 23 grams. That's the ball ammo.
We're going to try and punch through Durandium armor (about 1 cm thick) with the standard ball round. Let's go with 5,000 m/s as our speed. So, calculate that out ... HOLY JESUS. I should've done these calculations when I was designing the system!
5000 m/s = 16404.1995 ft/s
[355 grains x (16404.1995 ft/s squared)] / 450240 =
212,175 foot-pounds of energy! That's
287,663.78 joules! Jesus Christ!
So, that's the ENERGY ALONE that you need to possibly penetrate Durandium armor. Nevermind bullet shape, bullet material, armor thickness, conditions, so on. That's just PURE energy.
Jesus. What have I done?