Beeman P17 Trigger

Hope I'm not the only one playing with some of the low end stuff. Still enjoying my Sheradon Blue Streak the folks bought for me back in the late '50's. Seem to recall it went back to the factory once for some kind of service.
At any rate, once I realized I wasn't going to find a really compact and accurate pellet pistol I started looking around and decided on a Beeman P3. Was in the process of saving up my nickels when on an impulse I picked up a P17 (Chinese clone?) at Walmart for $32.00. At that price my expectations were low, but wow!
Accuracy is great, trigger way better than I expected and the sights (my first fiber optics) have me thinking about getting something similar for some of my powder and smoke toys.

So, on to my question. What exactly does the hex screw in the trigger do? If sear engagement, I'll leave it alone. (Pull is now about 2 1/2 #.) On the other hand, if it controls overtravel I'll play with it.

I know. I could just start playing with it, but would be more comfortable if I heard from folks who had experience with the P17.
Thanks,
Rob
 
As I recall on my P17, the screw didn't do anything because it would not screw into the trigger shoe far enough. Right from the factory, the screw seated on a counter bored ID "shelf" in the trigger shoe too soon to be of any use. Rather than trying to find a longer screw, I recall that I had to drill out the bore from the back side (opposite side of where the screw driver adjustment is made) so the screw could be screwed-in further. I remember that I had to be very careful not to drill into the threads (drill press to set depth recommended). Then the screw had the effect of reducing takeup rather than limited over travel.

I polished a number of surfaces in the trigger and lubed with tiny amounts of moly lube. I hate automatic safeties and I recall leaving out one part, which turned the safety into a good ol' manual safety. :) The trigger was significantly improved. I still have the pistol but sorry that I don't have it with me, ATM.