Ok, by that subject you should realize I'm new. 
This gun has a screw right behind the gauge, the manual calls it a regulator adjust screw. What exactly do I do with this? I'm assuming it regulates my CO2 to an extent, but how can I tell how much to regulate? The gauge doesn't seem to move when I adjust it, but now I've got the velocity adjust tightened all the way and it's only at 291 fps? Does anyone have any advice on this, and thanks.
This gun has a screw right behind the gauge, the manual calls it a regulator adjust screw. What exactly do I do with this? I'm assuming it regulates my CO2 to an extent, but how can I tell how much to regulate? The gauge doesn't seem to move when I adjust it, but now I've got the velocity adjust tightened all the way and it's only at 291 fps? Does anyone have any advice on this, and thanks.