I was always under the impression that the HW110 doesnt have a conventional regulator but has some custom jiggery pokery which operates like a regulator. However on the weihrauch.de website it does say "with regulator". It has ruined me though as its so easy to shoot and you dont have to account for the sweetspot like you do with the S410. Definitely 2 different styles of shooting required when switching between the 2
It uses a different style but there is a regulator. There's some odd discussions on the internet but they're mistaken.
I don't know if I could go back to unregulated. I took the reg out of a rifle that normally was unregged and the power curve was astonishingly bad. Pellets bouncing off a wad of newspaper at max pressure and so slow the chrono couldn't see them. Then the power slowly went up to too high then back down again. Naaaah.
If you have a large bottle gun the "good" pressure zone is probably quite reasonable but I have small tube air reservoirs and I might be looking at 20 consistent shots unregged. Or with regulator, 50-60. It's an easy choice.
I've heard good things about well designed unregulated rifles but it's just better with a reg so why bother.