The 12G with buckshot on Scotland map is bugged. Close range shots with buckshot on even small deer like roe deer and sika, as well as red fox, gives you a fail on the score due to no vitals hits.
This is game breaking for the 12G as the buckshot is then literally useless and will always result in a reduced / failed score.
Birdshots kill birds with full score despite no vitals being hit. Buckshot should work the same way and not require vital hits for full score.
This must be fixed otherwise there is virtually no reason to unlock and use the 12G shotgun.