Re: G7 BC for federal premium 300 wm 180 gr tb
Probably going to be around the .240-.245 mark.
Edit to add. After looking up what bullet is used in that ammo it appears as though they are using the Speer Trophy bonded bear claw which is a flat based bullet. In which case you should be using the G1 standard. Never the less the G7 BC is probably somewhere around that of the Nosler Partition which is .184. and a G1 of .359