Snowpeak Artemis P15 5.5mm - location of hammer spring adjustment screw

Good Afternoon all. I would like to know where the adjustment screw for the Artemis P15 is located at on the rifle? I would like to tinker a bit with fps with my current pellets (Hades 15.89gr) which is running at 834fps avg. I would like to possibly take it up up between 875fps and 925fps depending on what my pcp like. The reason for the adjustment is that this is my son's (6 year old) first rifle which he will shoot birds, meerkat and or rabbits with while we are on hunting farms, so he is not precise with his shot placements and I want to go up a few grains in pellet weight or even go to 21 gr slugs if he does miss the head, the impact would be great enough to humanely take the animal down.

Here is some 5 shot groups I took one evening at about 10 meters. The rifle was zeroed on 25 meters with the Hades.

Hades 15.89gr @ 10mts 834fps.jpg


H&N Hornets 16.20gr @ 10mts.jpg
 
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no there wasn't a click mate, and she thought she may have fixed the regulator with just cleaning it and an even bigger o ring around the regulator lol 🙄😂.
and no she never messed with the old regulator she thought it was going to work after a clean and a over sized o ring 😂 and I'd only be taking it up to 12 lb's because I don't know weather you know but huma have asked what I wanted it set to so I've just asked for the standard 12 lb and now I'm trying to get hold of everything I need for the artemis to have a new look to it and be shooting as it was a d I'll be more than happy. thank you for getting back to me pal i appreciate it, as I said any good info for the artemis I'd love to hear😊🤝