I had dropped my .22 DS Huntsman Regal to 20.5 ft/lbs via replacing the factory hammer spring with a 1.5mm wire gauge x 60mm length spring sourced from AliExpress.
As I was getting a nice 75 shot unregulated string that peaked at about 155 bar on the rifle gauge, I thought I’d try sticking a Huma reg in - as I could use a “reasonable” (for Daystate) reg pressure. I set the Huma to 140bar on the Huma paper scale - as I knew from past experience that the Huma and rifle gauge differed by 15-18bar. Nailed it as rifle gauge (now reg pressure gauge) reads 158 bar. My Huma also has a much larger plenum than the factory Huma “FAC” reg. Rifle was shooting 15.89 at 765fps - peak power of the unregulated string - so I’m happy with the Huma setting. I’ll have to run a regulated string, hoping to get 55 shots on the reg.
Yesterday I used the same 1.5mm x 60mm AliExpress spring to reduce power on my .25 DS Renegade HP. With factory spring its an unregulated beast - shooting 34g at 930fps peak - this basically made 25.4g unusable as they peaked at 1,020 fps. With the lighter spring, I got a nice 25 shot sweetspot of 930-950-930 with the 25.4g. Today I’ll run a string with 34g. If peak around 880fps, I’ll likely not shim or change 1.5mm spring further - and drop in a Huma reg set at where the rifle is making peak power - appears to be about 165-70bar on rifle gauge.
I’m primarily using these Daystates to target shoot, so turning down the power and regulating should improve target accuracy.
FYI: Renegade HP does not use slingshot hammer like the non-HP Renegade does - so cannot adjust power on HP via ss hammer length of throw adjustment (see photo of HP hammer in rifle). So power adjustment by “old school” shimming hs.
Got to remove the electronic trigger assembly to allow access to the rear cap retainer on Renegade. Not hard to do, but to reinstall the trigger assembly, you must hold the rifle cocking lever all the way back to get the trigger assembly to properly seat. There’s always a trick, lol.