I have had the Jammin shocks both RTR and currently Big Bore.
Extend the shaft all the way down and fill the shock body about half way push up and down 3 or 4 times leave to settle and do the other.
Come back the first and fill up to the top except for about 1 or 2mm.
Now push the shock shaft and and donw to ensure no bubbles.
Leave to settle in extend position and fill the other up.
Now on the first again and push the shock shaft half way up and hold the shock body between thumb and index+middle finger with the shaft resting in palm.
no put the cap with pressure bladder installed over the top and tighten, some shock oil may come out this is the bleeding part.
Once tightened and you enxtend and push the shock shaft back up and release it should only come back out about 10-12mm or so.
If it comes out too far then take top of and using a bit of tissue soak up some shock oil.

If using the big bore there a hole in the cap this bleeds the oil a bit better so remember have the shock at an angle and then screw on this big bore cap with the hol facing upward...oh meant to say there to screw it on rotate the body instead of the cap so the hole stay at top as any air will be at the top.

Good luck
Nick