Meanwhile the 115mm U-5TS is an L/52 (6 meter) barrel and the 120mm KBM-2 is a non-standard L/50 of also roughly 6 meters length.
"Standard" 120s tended to be L/44 (5.3m) and L/55 (6.6m), and the M68 being used by the M60A3 is L/52 (5.3m).
-So far nobody has decided to use the french L/52 120mm,
yet.
Just in case anyone was having difficulty visualizing the tree-trunks of angry boom-booms.
-Anyways, I'm not as bad as Lauralix, who apparently recently took a DTC-10-125 tank round home with him for further studies.
According to the Rheinmetall CEO Armin Papperger the barrels of the PzH 2000 had an expected lifetime of around 4,500 shots, but to the surprise of the manufacturer they have achieved up to 20,000
The 40 km standard-range is also pretty promising (a 6 km boost if using a special propelling charge). And can do 60-90 km with special ammunition.
But yeah, the barrel life on my tank... not great
The KBA-3 gun - which corresponds to the 2A46M-1 - lacked a chrome lining and as such, had a barrel life of just 200 rounds when firing standard APFSDS ammunition (3BM42). The barrel life of the 2A46M is greatly inferior to that of the M256 and Rh120, as the former has a useful life of 600 M829A1 rounds and the latter has a useful life of 700 DM13 rounds, or 400-600 DM33 rounds. It is advertised that with a chrome lining, the barrel lifespan of the 2A46M is 1,200 EFC and the number of standard APFSDS ammunition (3BM42) that could be fired is 450 rounds.
Based on the limited information available, the U-5TS appears to have had an acceptable level of durability. It has an average barrel life of 450 shots or 400-450 shots, depending on the source
Basically ~100 rds of APFSDS for the 115mm.