What is the technical challenge with creating a 125mm APFSDS single piece round? I was thinking a larger bore means more charges & a longer round. Length of the penetrator has a direct effect on DoP. I know we have to look at autoloader compatibility too.
A two-piece ammo can use a safer carousel loader whereas a single-piece ammo needs a bustle loader. The bustle loader makes the tank longer, and in turn bigger, taller, and heavier. This goes against the Russian doctrine of being small, light, and fast.
So it's primarily doctrinal.
Russia continues to make two-piece even for newer tanks 'cause the industry has now settled on it. Now they make long rod penetrators two-piece too, for the T-14.
Europeans seem to be moving toward higher caliber tank guns. If the FICV is supposed to replace the T90s, we would be replacing a 125mm main gun with 120mm. Seems like a step in the wrong direction.
Too expensive. Lower fire rate and more heat. Logistics issues too, both the gun and ammo are heavy. The better option is to use electrothermal-chemical guns. A 120 mm ETC can give us the same muzzle velocity as a 135/140 mm conventional gun.
Start slow like the XM360 and build up to it eventually.
Why not? The SAMHO will be cheaper than the Nag Mk2. SAL seeker vs. IIR seeker. We could reserve the Mk2 for enemy tanks & AFVs/IFVs & the SAMHO for JLTV/Humvee type vehicles or fixed forward positions. After all the Army still uses Kornets/Konkurs at Pak LoC bunkers despite having better ATGMs.
SAMHO was developed 'cause Nag was too big to be fired by guns. 150 mm. It will be used on T-90s too.
It will get an IIR upgrade too. But SAL will also be used, it's more reliable and you can use it via drones.









