My time still sm1 not leo2. 80% first hit rate with a 1950s weapon system not bad liao.
OIC. My estimate, from my experience and some complete guessing is as follows:
AMX-13 (pre-mod) - 70% first round hit probability at 1000m, 60% at 1500m, and forget it at longer range than that.
AMX-13 SM1 post mod - 90% first round hit at 1000m, 80% at 1500m, 65% at 2000m
(with the laser rangefinder, ballistic computer and later APFSDS rounds)
Leo 2 - 100% first round hit at 1000m, 100% at 1500m, 95% at 2000m, 90% at 2500m, 85% at 3000m
Having said that, i know some gunners using original AMX-13 that will do 90% hit probability at 1500m, they are very good, and that 75mm gun is the best tank gun under 100mm in the world. Its better than all the US 75mm, 76mm, the Russian 76mm, the British 75mm, the French and Belgian 90mm.