challenge can you provide more details? A scan of the article would be fantastic. I find this claim rather hard to believe. Well I guess it depends on how much pressure the gun can stand. If it can stand the same or more pressure as a 125, but with a longer length to accelerate the projectile, it may give more muzzle energy.
edit: first few pages of google for 93式 穿甲 comes up with a few pages describing its performance. The quoted figures are 520 to 540 mm RHA at 2000 meters.
the artilce original published 5 years ago.I check it again.