AEA Bintac M50C - An AEA HP MAX based air rifle

I recently purchased a Bintac M50C with regulator and the 22" barrel and 500cc tank combo options.

The Bintac M50C big-bore airgun is based on AAE's HP MAX bolt action offering, with options for 13" and 22" barrels, larger tanks (based on barrel length 350cc for the 13" and 500cc for the 22" barrels ) and a choice of adding an externally adjustable regulator.

I'm trying to figure out what the regulator is set at. So, hopefully, someone here can answer this, and possibly other questions about this particular big-bore PCP airgun.

Also, I hope to get info on issues and how to resolve them.

I haven't had a chance to take it out, yet; due to weather. But, I'm really looking forward to it.