I've managed to come across a Rem 700 Short action sitting in an HS precision stock (ADL) with an unknown aftermarket barrel in 6mm BR. I have no experience with the 6 BR at all, I've been loading my own for about 43 years , so I am familiar with the procedure. My question is , what is the opinion of the more experienced with this round ? Its an unknown to me as to the exact variant that the chamber could be , 6 BR AI, who knows whether it would require neck turning , barrel twist , there are alot of variables that could be encountered. Would you take a chance and get something you'd have to rebuild ? or just find a good donor action and build what you wanted?