Assuming this is not a NIB rifle?
That looks like a rust spot that caused pitting. Probably from storage. Not from manufacturing. Tikka will tell you the same I bet.
So have you noticed a shift in accuracy? I would not worry about it unless your group size has noticibly increased.
Faith and love of others knows no mileage nor bounds. That's simply the way it is.
dogzapper
After the game is over, the king and the pawn go into the same box.
Italian Proverb
| 
