I have a 40X that doesn't ignite about 1 in 10 rounds. Sometimes it will ignite after a second strike. Tried three kinds of ammo, does it with all three so I assume it is the rifle and its a headspace issue? I took the bolt apart and made sure the firing ping and spring looked good. Who in Denver would be a good gunsmith to have work on it? I assume headspacing isn't something I can do with my duct tape and dremel tool.

What is 'head space' on a 22LR?