Little over 10 1/2 for me, tried to make it 12, just couldn't open up enough of the stock, then kind of failed when I bedded what lead I could get in it.
10 1/2 should be ok though. Iron sights.
I don't mind a heavy gun, my longer range rigs were always heavier, 14-16lbs or so, but they had scopes, and therefore bases and rings as well, I always went heavy duty with those as well, badger and the like.
Really never been a fan of light guns, heavy is stable, stable is accurate. Smooth as well.