The Caribou Season kicked of last july 14. in Iceland. Up until 1. of august we can only hunt bucks, but after that we can hunt cows also.
The first buck was brought down with a Tikka T3, it was 198 pounds but rifle caliber, bullet selection and range are yet to be disclosed.
There are pictures of the buck on this forum.
http://hlad.is/forums/comments.php?forumid=2&threadid=172209