just bought a bsa r10 mk2 was testing thro skan once on the button was shooting 11.7 then 11.6 11.5 11.4 11.3 11.2 checked the gauge yup classic case of running out of air.after further testing found out how crap these bsa regs are had a very noticable sweet spot from 180 bar down to 110 bar was shooting like a unregulated gun got onto Darrin at XTX for huma reg once I fitted it bang on from 230 bar.