Triple beam scales for reloading

[skinner2008]

I am looking to get a new scale for my long range rifle loads and want a lab grade triple beam scale like the Ohaus beam scales but all I can find is in grams not grains. Can anyone help me that knows how and where I can find one of these thanks

 

[FearNoWind]

I believe these people have a model that renders measurements in grains

http://www.adamequipment.com/am/balances/150