I've had trouble with a batch of Lapua 223 brass also, and Thomas wouldn't help me out.
Lake City is my go to 223 brass. Never had a problem with it, and it is WAY more consistent than Lapua 223. And I've weighed and measured thousands of NEW Lapua and Lake City 223 cases.
I'd have to agree. Lapua may be the go-to in 6BR, but the 223 isn't worth the extra money over LC. You can still find 250 ct bags of new LC for under 40 bucks.