Shinken,
The first run will be 150-160 grains, but I'm working on a system that would allow you to bump that up 25 grains without changing heads. I think that would make them more versatile for guys to tune to their setup with. I'm a little hesitant to do advanced orders just because I don't machine them myself and the folks that do have other business to run on the machine so I can't promise the date they'll be available. I will definitely put a post on here when they are ready to ship. Thanks,
Stan