I'm also trying to set up my 1740 HiPac.
My last visit to the clubs chrono produced similar results.
I'll post my string when I get home but it did have a spread of around 100fps returning up to 30 shots with a fill of 120bar.
I need to do a test like Roberts great post on how fps spread effects accuracy.
I'd like to know how to flatten the curve and open to suggestions. I could try fill pressures and have a spare hammer/striker that I can get reduced.
I live in the UK with a 6fpe max gun law. I'm looking for a maximum number of consistent 5fpe shots.