Hello everyone, I am having a problem when I attempt to adjust the velocity of my 98 custom. On a few of my markers, I will attempt to increase the velocity and will all but completely remove the velocity adjustment screw yet notice no difference on the chronograph. This has happened with multiple markers so I am curious if this is a common problem and hoping there is a simple solution to fix it. I'm using HPA to test them with and I have been firing multiple times while adjusting so I do not believe it is some random fluke. Any help is greatly appreciated. Thanks!