I drove back a kilometer, to the forest with the flak casings and spent some six hours there combing it for brass. I found 5 or six coins, one German the rest Finnish, and in total 19 empty 2cm casings. I did find several live ones as well and the forest seems to be littered with all the live heads that had been pulled off the casings so for now I think I am done with that little patch of forest - it is too big a risk with those unstable explody things.
I did find a few other bits as well, a nice little dataplate, a gasmask cannister, a 7.5cm LiG casing and a firing pin for a K98 rifle and some other "standard" relics.
Now it had become afternoon and I had to get back home to get some food and go around the house and tap some fresh and nice Birch juice from the trees, that is some tasty and healthy stuff :)
If the weather holds up I might make a stroll to the site where I ve been finding Notek lights and vehicle parts, hopefully there will be no moose, bears or other relic-hunters` eating animals there :)