I have that run of brass, yes it was made by Norma for Lapua, but it is different to the same era Norma. The Lapua stamped brass is heavier and has a thicker web.Last batch of Lapua 300 WM (many years ago) was actually special run made by Norma for Laupa but head stamped Lapua
I still have 300 un-opened pieces and still using the original 200 piece batch in F-class, I have lost count on number of firings and haven’t lost a single case yet, pockets are still tight.
I got 1000 pieces back in ‘88, stupidly sold 500 in 100 lot bags to other shooters, when I discovered it was discontinued I was kicking myself for selling it.
Lapua were trying to sponsor the comp here and that brass was only .25C each at the time, about a quarter of the normal price.
Norma brass is the other brand I have used in F-class successfully.
I use ADG for my LR hunting when I can get it. Using re-sized 7RM in my 264WM and it is fantastic brass so far, it is tough.