Reload.
Now if they could fill those 40MM rounds with willy pete......
L
There is a 40m WP smoke/mark WP round. At least there was last time I shot an M79, about 1982.
The most common round these days is the HEDP (and the next most common is the training/practice round, with a blue plastic ogive and full of orange marking powder -- it doesn't have the steel weight in it any more), but there have been dozens of kinds of 40mm round.
The British called a 37mm AT gun they used in WWII a "two pounder." (The US used the same thing and called it 37mm). So we could reckon the thing that way, in weight of cannon ball rather than as gauge, which is size of cannonball.
d.o.l.
Criminal Number 18F