I have several bolt action rifle builds in the pipeline and want to add fixed sights to at least one of them. I also have one rifle that will receive a receiver mounted sight with a barrel mounted front sight. Looks like I can either drill and tap the barrel for a pair of front and rear sight bases, or directly dovetail the barrel and add the sights that way. Which is the preferred way to do it? Also, how should I go about determining which height sights I need without trial and error?