Very close ballisticly. It comes down to two things. Would you pay a premium to use better brass? If so go with Lapua. Are you building on a 700 action? If so go edge/RUM.
Any other opinions? Thanks!
If you are ruining brass after two firings you are (in my opinion) way over pressure. I don't care what make the brass is, you run it too hard and it goes fast.
Broz
Just curious but did you look at doing a Lapua Improved at all before you had your MkV rebarreled to a standard 338 Lapua? Except for the the dies the cost is exactly the same and why not take advantage of the extra 100-150fps as well as they, typically, shoot standard 338 Lapua rounds MOA.