the "ringing" of the metal at the shot, is dampened a bit. the difference is audible, altho barely so. Running the can wet is worth quite a bit more, for a shot or 3, depending upon the design. I"ve never tried anything but a shot of wd40 and then a good trickle of water run into the front endcap, and the can rotated for a minute. If the can has a sleeve area, packed with single wrap screen, the wet effect lasts for about 50% more shots. If it has a wetted, screen packed underchamber, the effect is to about double the number of shots before more liquid is required. On a gun with the browning tilting barrel, the addition of water can render the can too heavy to let the slide cycle, if can weight is already marginal, as in 5 ozs.