Quoted:
My take, Lapua brass will be very inform, have a neck wall thickness of .0145, comes in small primer size that the flash channels are drilled/not punched, and very, very good brass if you don't want to have to do much brass prep/don't mind playing the cost for the brass
On the other hand, dirty LC M118 LR or Match once fired brass is cheap enough by the 1K to start with/prep, end up with about a 20% rejection if your really picky in the end, so your only into 800 case for around $150 (from your first 1K lot) isntead.
https://www.brassbombers.com/images/012.jpg
As for GM205 verses GM210M primers (small verses large match primer), are you a good enough shot/ have a good enough rig that you will be able to tell the difference in the end?
In my F class 308 rigs at 1K, can get smaller groups with small primer cases, but not enough to really justify the cost of having to buy Lapua brass to get the small primer brass to begin with.
So again, if your looking for no case prep at all, then hard to beat Lapua brass.
If you are on the other had that tight groups comes from case prep, then something like LR/Match once fired case as parent cases to end up with your desired cases, may be the way to go isntead.
Hence it not just 6.5 that I create from 7.62 brass, but other's like 243 when I need a match case for it as well.