If you're running a HP bottle on the Euro Angel you WILL NOT get it down whatsoever. I had exactly the same issue with mine. A note Tom Allen gave me, was if you have the large volumizer attactched to the front of the gat, cram it FULL of tissue paper, then re-attach to your gun and you should get the velocity down. (Note, cram the volumizer that comes OFF the front of the gun full of tissue NOT the chamber that holds the cup seal!!! )
You are better off getting a LP regulator for your bottle though.
Any further problems, PM tom or maybe he'll find this thread on his own accord.