Don't forget to raise your rear sight a bit before making a new front sight with a taller blade, so that you will still have some adjustment for different loads. You can do a calculation to arrive at a correct front sight height, or you can simply add a bit to the existing sight with modeling clay, duxseal, solder, or even tape for a temporary experimental blade. When you change front sights, I would strongly consider a front sight pusher rather than pounding on the sight dove-tail with a drift for removal and installation so you don't risk loosening a rib solder joint.
Seems strange that the present sight puts you so far off the mark. Is it possibly an incorrect replacement? It would be nice to keep the original with the gun, but why bother if it isn't really original?
