I've owned Tikka rifles for years and I recently bought x2 new Tikka Strata's in 30-06. I can't get the bolt knob off one of the them to clean the firing pin. I'm very familiar with how to remove it. I've tried smacking it with a brass punch to get it to move and the thing just won't budge. The other Strata and my other Tikka bolt knobs come out no problem. Any suggestions?