Always been the problem with us. We sign up, agree to the requirements only to find that no one else has followed it and they’ve gone off and done something else.
Aye was a bit of a shambles, and from that point we then went more against the nato stuff, Only now with CR3 are we actively changing the barrel to be more in line with sharing ammunation with NATO allies
Only because all the places where you produced your own stuff have all been closed due to bankruptcy or never having enough money from a useless government
Personally I dont think that 130mm guns will become the new thing for a while, they still have some pretty huge drawbacks which hold NATO countries from using them.
The requirement for an autoloader often removing a crew member. NATO tanks are pretty big and from what I’ve heard 3 crew makes maintenance difficult.
Bigger gun → Bigger ammo → Less ammo → Less combat longevity
Bigger Gun → More weight → Not great considering NATO is trying to downsize their tanks at the moment.
Supply chain issues - Switching to 130mm makes all 120mm useless, not really want you want when a big war might be looming.
Improved ammunition - Better NATO ammo especially programmed HE making the need for 130mm shells less desperate.
For example Hungary are buying the KF51, but the 120mm version not the 130mm version.
But im by no means an expert, thats a few that I’ve heard which seem to make sense.
Also, the Challenger 3 turret as far as I’m aware was designed to be able to fit the 130mm RHM gun
Many countries don’t operate tanks alone. For example, French armored divisions have 2 scout cars for each tanks, with crew available for maintaining the tanks along side the tankers
But also means bigger impact per round fired. A 140mm with explosive filler will have better infantry impact. And armor piercing shell will penetrate more armored threats.
Also, most newer prototypes feature roof mounted remote controlled weapons for better effectiveness against infantry
But having an auto loader allows for smaller footprint than a manual loader, so you can gain weight that way
The French ASCALON 140mm aims to solve that issue. The chamber is compatible with all 120mm ammunition, is compatible with 140mm, and should be compatible with 130mm. Only the gun needs to be replaced and that can be achieved in 30 minutes. This way you can empty the 120mm stocks and switch to 140mm as you wish.
Also, the semi telescopic nature of the shell helps to have a smaller footprint than regular shells, meaning that vehicle equipped with the ASCALON would carry almost as much 140mm as they would 120mm, and auto loader would be compatible with both
Following this, we should all go back to 30mm, since technology has sufficiently advanced so that we can have smart munitions of that caliber