What I have read makes me think that "user-adjustable" is a marketing term. The fine print seems to be"by a qualified gunsmith" and as of now, Steyr does not recognize anyone in the US as being qualified. I happen to like the way my two Prohunters were set at the factory, but if I didn't I would take them back to the shop where I bought them-- the gunsmith there is such a Steyr nut he carries in his shirt pocket a laminated group he shot with a Prohunter. There is a website http://www.frfrogspad.com
where the site author offers to send you instructions on setting the trigger on a Steyr Scout if you will send him a liability disclaimer and a small fee to cover printing costs. I am not sure if this is the same trigger, it may be a double set like some other Steyr rifles. I do know that you must remove the barreled action from the stock in order to do the adjustment, and my gunsmith was very insistent that the forearm screw be retorqued to a very specified setting-- he told me he would do this for me if I didn't have a torque wrench. Setting this seems to be necessary for consistent accuracy. Hope this helps.