I too am waiting for one of these rifles. I just got off the phone with Browning. The A-bolt hunter, left hand that I want to get won't be on the shelves until June. By that time there should be some brass available for reloading.
It look like I may start with the 200 gr 8 mm bullets.
I imagine that this 6 lb, 9 oz rifle will pack a punch at both ends but should be nice to carry on my future elk hunts.
Heck, I may even retire (or sell) my Ruger 77 - 300 Win mag.