Originally Posted by igousigloo
I also feel that it is supply and demand. Last year the Federal Govt. was stocking up and ordered millions of rounds of 40mm. Now they are stocked up and the demand is lower for that round so there is more supply for it.
They must have a lot of grenade launchers.
Just playing. 40mm is much bigger than .40 S&W. It's the size of rifle launched grenades. In millimeters, the .40 is 10mmx21mm, compared to 9mmx19mm which is .355-358.
.40 represents .4 of 1 inch