The red dot makes precise shooting substantially easier. I had Lasik surgery done a number of years back and now the front sights are not as crisp as the once were so the RDOs help.
The mount is a Weigatinny by Jack Weigand. Basically a modified 1913 rail. Nice little setups.
THE CHAIR IS AGAINST THE WALL.
The Tikka T3 in .308 Winchester is the Glock 19 of the rifle world.