IIRC, the Soviets did have a 240mm mortar. And it was a breech-loader; I guess it would be hard to hand drop a round of that size. But I think it depends on angle. Above a certain angle, the category changes from howitzer to mortar. Any ex-gunners out there could clear this up.
It depends on the angle to?
Ah, come on. A massive breech-loading mortar.... dude, that’s a cannon!
Why the denial? does it need a therapist?
I will ask a few of my ex-artillery friends.
In writing, of course; they’re mostly deaf.