The manual says not to use rifle if tank pressure falls below “regulator” pressure but it doesn’t specify “which” regulator. Can anyone clarify which regulator, 1st or 2nd? Also what is correct fill pressure in bottle, 230 or 250 bar?
Soooo from what I have gathered, you basically don't want to drop below the first reg or bottle reg pressure. Doing so can cause to o-rings to unseat and move unnecessarily. (probably eventually cause a leak or something) But you can get away with shooting down to the second reg. Just might get varied results.
You don’t want your bottle pressure to get below your second regulator pressure. You can shoot down below the first reg but not the second reg. If your second regulator is set at 100bar you can shoot the bottle down to a little over 100bar.
Keep in mind a lower pressure differential before and after the second reg, the more time it will take to re-charge the plenum and you will need to give the gun a little longer between cycles.