I got rid of my J-Lock and the whole firing pin assembly and went with the GTR below. I love it! My 700 was cratering every primer, so I also had the bolt face bushed for a small diameter (.062) firing pin. The firing stock pin spring is also funky and drags on the bolt interior bore. Problems Solved. http://www.gretanrifles.com/detailsGTR.asp?id=88
Sadly it isnt unlocked, you can disassemble the bolt but still cant get to the lock, unless im an idiot and couldnt figure it out, im trying the paper clip idea now.
You could probably take it to a local sporting goods store. They would probably use the key out of another gun to open it for you. I bought a shotgun that was locked and sportsmans warehouse did it for me.
You didn't get it with the clip? I unlocked 2 inside of a minute yesterday. Stick it all the way deep and turn it. Be careful not to break the paperclip off.......