Probably no worse than 75% of the production locks out there that folks shoot every day. Comes down to a sharp flint, a properly hardened frizzen and a clear open path or fire channel from pan to the main charge. It’s not that difficult. And the most expensive lock in the world will not overcome a dull flint or a blocked fire channel.If it sparks, don't worry about it. You have a cheap lock, no use putting lipstick on a pig