Originally Posted by here4parts
And a bad bolt will not direct air correctly (sending some to the feedneck).
More likely waste potential energy by not transferring it efficiently to the ball. To tight a turn, inefficient air passage, to much or to little constriction for set valve pressure and volume. Easier to seal with orings but more drag. The variables can be endless. What really matters is what you are trying to tune your marker to do. Max efficiency for a small tank, lowest pressure, quietest gun, smoothest pump stroke, faster cycling, softer on paint, lower moving mass for gentler cycling, or some combination of these factors.