>With a pump, you'll hear the second round being chambered (no silencer for the pump action). You can tell a pump w/o seeing it.
>
>Semi autos don't have that second (open) pipe sticking all the way out.
Are you willing to bet your life in your knowledge? First you said it was visually easy to pick them up, now you said it is for the sound you can pick them up, what is next, the smell?
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges