You know, there was always something about nuclear artillery that was troubling to me. The idea of a huge chemical explosion (all those Gs) to propel a nuclear device... well... I’m just saying I wouldn’t volunteer to be on the crew.
The artillery shells aren't any heavier than conventional ones. They were made to be fired from existing artillery guns.
Because the yield was typically far below one kt, from 22t- 75t, there was no danger from a blast wave from targets a mile away or so.
You'd want to be a little further away from anything with a yield beyond one or two kt though.