RE: Iron sites with a scope
What about using a set of see through scope bases? I would say that 3 power would be low enough for a 40 yard shot, even a 10 yard shot. Just keep in mind are you sighting your scope in at 100, or 200 yards, keep in mind that your bullet will be high and that you should practice shooting at close distances as well to get used to shooting your rifle. Iron sights are an invaluable asset in my opinion as you stated not many people as you said carry a back up rifle scope and if one did your hunt would be over for a while, at least till you get the new scope on and sighted in. If you had iron sights you would still be able to take a shot if needed!