Originally Posted by shield40
So I tried the suggestions of a 21ms dwell with the LPR about 2 1/2 to 3 turns out. Unfortunately, I didn't have very good luck with these settings. I was either breaking paint like crazy or get very little velocity from the marker.
I tried the settings according to the manual with my BW bolt and right now my dwell is set to 10ms and the LPR is set to the stock settings (4 turns out) and I am shooting in the high 280's to low 290's.
What issues could I face with these settings? Does anyone else have these settings or setting that are close to mine?
Dwell represents the time current is sent to the solenoid coil, which translates to time the bolt has to move forward. LPR controls the pressure supplied to the bolt sail, which roughly translates to bolt speed.
The goal is to move the bolt forward and allow the chamber to empty before the bolt retracts. You can do this by increasing the LPR and consequently bolt speed, or by increasing the dwell and amount of time air is directed to propel the bolt forward.
You may get your marker to run at a dwell of 10ms, but could easily run in to consistency problems down the road, especially in colder weather. It's also usually gentler on paint to run a higher dwell and lower LPR pressure due to the slower bolt speed.
What I would recommend is choosing a dwell setting between 18-21ms, then turn your LPR in/clockwise until you feel resistance. Air up the marker, and while pulling the trigger slowly increase the LPR (counter-clockwise) until the bolt is fully cycling. Then increase by 1/2 rotation more and chrono.
I hate the "Set your LPR to 3 turns out" etc because for one, different markers require different adjustments, and two, there is no consistent starting point. Some people turn the adjuster in too far, damage their reg seat and end up with a poor LPR setting anyways.