Before I did any bbl-bending excercizes,,I'd replace the front bead with a larger one.
That will generally make you naturally point the bbl lower on the target as you look just over the top of the taller bead.
The Ithaca's are standard 6-48 IIRC.
Lot's of large(r) dia round bead sites available in steel, brass, colors, ect.
Worth a try before you go the blacksmithing route though that can give good results if done correctly.
The correction needed is very small but must be done very carefully.
Tubing bends differently than a solid bar.
