Q: What is the range of 152mm? 155mm? 105mm? 120mm mortars?
Good grief, the level here....
You can look all this stuff up you know. Ex. different 152mm systems and ammo have different max ranges cited. Same goes for 155mm, etc.
In general the cited 152mm ranges seem optimistic in practice, or maybe it’s that the CEP at range can get pretty bad. Generally the Nato 155mm seem to outrange Russian 152mm.
Interestingly the Russians seem to have begun drawing the very old D1(M1943)152mm howitzers out of stock, equivalent to US M114 155mm, as there are stockpiles for their shells, which are apparently incompatible with the modern 152mm.