The reg is easy to get at- there is a great YouTube vid for the uragan 1 out there, bet the reg is in the same place. I did increase the uragan reg pressure on my #1 , but ended up with a Huma. Either one, mark your starting point with a perm marker, turn the correct direction, Chrony the results and increase or decrease hammer pressure depending on your settings. You don't have to reassemble the gun completely to get your Chrony results but unfortunately, on the Uragan1, you do have to empty the bottle completely each time; sounds worse than it is, at least if you have an air compressor handy.
Steps were:
Empty air chamber, disassemble rifle to view reg. Mark current reg position and turn the screw to increase or decrease reg pressure. Minor movements only.
Refill gun- shoot over Chrony, unassembled. Used hammer spring tension- increase until no change, back off 1/4 turn. Shoot a string to see if consistent. With stock reg, it was inconsistent after adding pressure and hammer tension. Backed off hammer further, got consistency and increased fps..
Kept repeating until I felt had the best compromise between power, consistency and "stress" during the shot cycle.
Went from 900- ish with 44 grn pellets to 960. Hybrids, knockouts and howlers are doing 925 fps. Great shot count still, smooth shot cycle without a lot of jump.
Had some false starts with the stock reg, dropped a few duckets for the Huma and got less reg pressure ( bigger plenum), easier adjustment ( still have to empty rifle of air) and solid consistency, shot to shot. About a 1/4 turn less hammer tension, reg is set less as well but I am only using the Huma markings. I don't own a reg tester. Scott Schneider tested my stock reg so I knew where that was at- which I've since forgot
used that number as my starting point on the Huma and backed the reg down to it's current happy place
It will do much more velocity, but I use it for varmints on property's that may be close to dwellings or farm animals. Being able to shoot slugs and pellets well is paramount for my use.