Pun fully intended... I know it's a stretch since the cartridge is fairly new and dies are just now becoming available but figured I'd at least ask. I'm considering a 429 DE barrel for my DE but not really keen on $30 for a box of 20. I don't mind buying a few boxes to get me started obviously but ideally I'd have a source of brass. I have some once-fired 50AE that I don't mind trying it on and Lee appears to have dies coming very soon as well.
Edit: I ordered the dies from Lee (says backorder, due Friday but we'll see) and the most reasonable price for ammo is $37/box of 20. Probably get 3 boxes and a barrel to start with.