I'm on another forum where a member recently acquired a BD14 and says he loves it! The basic options from Krieghoff are as follows...(they have a very useful publicly available full price list .pdf)
Krieghoffs drilling rifle barrel(s):
6x70R, 6.5x57R, 6.5x65R, 7x57R, 7x65R, .308 Win, .30-06...