Sorry all, I am sure this has been brought up before but I have lost/forgotten the answer. Assume I have a .375 S/S double. I put a low mag scope on it. I am sure I have read that you only sight the scope in for one barrel or the other but I can't for the life of me work out why. Wouldn't it be better to shoot both barrels (I assume you would get lets say 2" at 100 yds and sight the scope to the middle of the group. If I have asked this before apologies......the gun went for engraving yesterday...not too long left best, Mike