No country puts such details on a website about ammunitions used for testing , If you want details of test reports then well sorry No country will give you about any programs , But i have followed Arjun tank developments for years but such information has been provided in various indian defence magazines by developers , may be you can search in google for such information , but i am putting all from my memory of following Arjun program .
I am putting some of the points which i remembered reading ,You can take it or leave it .
Arjun has been evaluated by Third party defence contractors like Israeli Merkava tank developers , and given its protection level Big thumbs up Specially Kanchan Armour of Arjun
Arjun on one to one with T-90 has emerged superior .
Any Tank developer does test live arounds on Tanks they build to check protection level its a common facts .
Chinese tank ammunition can be procured easily from friendly countries, It was mentioned in one of the reports about Indian spy agencies role in procurement .
British are moving to smoothbore gun on challenger 2 to use NATO standard ammunition developed in Germany and the US. 120 mm
Rheinmetall L55 smoothbore gun to be used in challenger 2 is the same used in German
Leopard 2 tank . Challengers 2 production is low in numbers so change of gun is due to maintain commonality of ammunition among allies .