I had a sub 12ftlb regal a few years ago. It was outstandingly accurate. They had problems with air leakes, it was the pressure gauge that was commonly at fault.
I sold it for a HW100 and never loooked back tbh. The Hw100 is just as accurate, is even quiter, and the mag system is hundreds of years ahead of the ricitty, notchy, double feeding Daystate mag system as well.
The Regal was/is a cracking air rifle.....but the HW100 is just so much better in every way.
Steve.