I moved the Weaver base back so that the front two screw holes in it aligned with the rear most threaded holes on the barrel. That way, it wasn't necessary to remove the front sight so as to use the holes beneath it. I then marked the location of the bases rear holes onto the barrel, drilled and tapped as was necessary. The new holes go into the meatier portion of the barrel, ahead of the chamber. If you're careful, you can do so without going all the way through. I wasn't particularly careful, so I now have holes through my barrel. They are, of course, filled with flush screw shanks loctitied securely in place. I figured that the relatively low pressure of the 12ga. would do me or the gun no harm, and a couple hundred rounds of mag loads over the years has demonstrated this to be true.
Now, my Leupold Turkey Ranger 2.5x can be removed if desired in order to use the iron sights, sighted above the base. It also puts the scope a bit further back, which helped me to more readily obtain correct eye relief. Many turkeys, if they could, would testify to the effectiveness of it all.
