SSX 303

Just got a used SSX 303 , and I have some question.

It also come with the nozzle kit , I tested it today

Test results:

Stock nozzle 0.43bbs red gas - 3 joule flat with half hop-up

2.3 nozzle 0.43bbs red gas - 1.1-1.2 joule

2.7 nozzle 0.43bbs red gas - 1.5-1.6 joule

Now my question is , the nozzle from nozzle set come with a screw in the nozzle is it adjustable or not , cause on the nozzle kit I have seen 2.3 is from 1.2 or 1.3 until 1.7 joule , the 2.7 is from 1.7 to 2.5 joule , and if anyone can tell me exactly when are you looking to the nozzle hole what direction should I turn it to increase or release . Thanks!