It's a leverage issue, I've got it on my Nork 213 as well.
Honestly, with the 7.62x25 chambered Norks I'd leave it be, that could very well assist in lock time. If I *had* to fix it, not saying I would, the solution would be to reshape the base of the hammer nose and radius the rear of the slide where it contacts the hammer (or the FP retainer, same diff).