Yep. Like henchman already stated. Oil that beast. If it continues to leak. Click the fish link in Zondos sig area. That is one of AGD's dealers. He should be able to get you what you need.
I would purchase a X-valve rebuild kit and a set of lvl 10 carriers and a few lvl 10 shims (don't think they come in the X-valve rebuild kits).
For now, If oil doesn't fix your problem. Pull the Power Tube tip off and remove all the lvl 10 shims. Re-air the valve and see if your still leaking down the barrel. If you stil are just wait for the rebuild kit. Rule of thumb for any mag. If you get in a UNK valve it's always best to do a full rebuild and start from scratch.