If it is just a little out of time you can use this method. Get some round stock the size of the screw head or a bit smaller. Measure the hole in the tang and turn a pilot that will fit the hole snug on the end of the round stock. Where the pilot meets the head diameter should be angled slightly like a counter sink, as in just a few degrees. You now have a punch. Lay the top of the tang on a substantial flat steel surface with a thin piece of lead between the tang and the steel. The lead will protect the finish and engraving. Have someone hold it on the steel backer and wack the inlet side of the hole with your punch. Start out light and try it for fit. If it is not enough a little more force on the hammer. You are trying to push the bottom of the hole up into the counter bore of the screw head and this will allow you to tighten the screw and time it and keep the wood to metal fit tight under the tang. The small amount to be pushed up should not affect how high the screw head sticks up above the tang surface that much. I've done this on out of time lock plate screws and bottom plate screws. How successful you are with this will depend on where the screw is making contact on the bottom of the hole.
