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Hmm, it seems you lack engineering skill, and must depends on pdf for simple numbers. I already knew that measuring from the center might be the case, because my calculation is twice the number on the image. But the common accuracy measurement in small arm is from farthest holes (diameter), not...

The dispersion calculation in this image is wrong, for example, the L44 is about .5m at 1000m which translates to 0.51 mil

Ah, many thanks

If I read it correctly, this is the most efficient in term of charge mass / projectile mass DM63: ~8kg charge launches ~8kg projectile (sabot + penetrator) at 1.6 - 1.7km/s M829A3: ~8kg of charge launches 10kg at 1.555 km/s And this Mk1 APFSDS uses only 3.2 kg of charge to launch 7.8kg to 1.66...

Some members in tank net said that current HE used in tank ammo, especially US ammo, is stable enough against SC jet and other types of shock. Anyone has info on whether or not current HE used in ammunition is safe?

I realized why Heat doesn't have fore aerodynamics case, e.g conical shield, not disturbing the jet isn't the reason, but maybe to avoid deflection when striking highly sloped target

Thanks I saw 3 cores inside that 3bm42. And it has both jacketed and multi segmented features, so how does it compares to modern one? ------------------ From logistical point of view, is there anyway to combine HE and shape charge on one projectile? Let say 105mm or 155mm HE-FRAG with shaped...

What is the different between the first gen steel sleeve WHA core vs the current trend of jacketed penetrator?

This newest was 1995 apfsds. Isn't it new tungsten penetrator claims having self sharpening, which may perform better for the same l/d?

Some sources suggested 140mm has 1.5m length (IIRC two pieces ammo). If it is single piece designed with maximized length then penetrator could reach 1.3m and if fired at +2000m/s IMO could penetrate 1.5m RHA

Does anyone have the chamber diameter of tank gun and artillery cannon 120/125/155mm? It seems slightly larger than gun diameter but I can't find info about it.