I put 60 rds of Berger 245 EOL through one of my 300 PRC this year to use the brass for reloading and to gather initial data. Every piece had ejector marks, swipe and was fully formed to the chamber on the first firing. Not even crappy hotnady brass had that issue.
I also fire formed 300 lapua 6.5x55 swede 139 scenar factory ammo in my 6.5 Addiction stainless barrel. I followed the same procedure as the carbon barrel. More than half of the rounds were bulged above the web, they had ejector slot marks on maybe 1/4 of the cases, some of those were bulged and others not.
I've been so thoroughly unimpressed with the last 260 rem brass, 6.5x55 swede and 300 PRC brass that I have gone away from Lapua altogether. The inconsistency in their virgin brass case lengths, the headspace of virgin brass, the fact that some primer pockets uniform with very little clean out. Some don't even touch and others take repeated cuts because of how much gets munched out.....I don't have anybof those issues with the over 8k pieces of Alpha or the 300 pieces of ADG I've gone through.
I just bought a bunch of peterson 300 PRC to replace the virign Lapua I was going to use. I have never used peterson before, so time will tell if it's as disappointing as Lapua has been.
So, a Ling winded complaint to sat, yes...I have noticed lapua cases are soft lately...too soft, especially at the web on that one lot.