I don't, I only know that it's been announced, which means that it will happen. I assume that it will be a while. The .450/.400 was announced over a year ago, and is just now becoming available. Their .400 bullets are also available now, and the brass will be along shortly I imagine. BTW, they will also be making bullets for the .450 in the correct 480 grain weight. Be aware though that getting their factory ammunition out in sufficient quantity will obviously have priority, and that brass and bullets will only become available when the surplus is available. I have new Hornady brass in .450/.400 and 9.3X74R, and its good stuff. It's worth waiting for and cheaper than the alternatives.