I've not used this alloy but my best guess would be if it's a GC design bullet to use the check. Testing could prove that wrong but at the velocities your looking for I would start with the check.
Next, keep in mind that a BHN number is completely relative. It is not only possible but likely that two different alloys will have the same BHN reading and each will behave/react differently in the same load based on what is in the alloy. A BHN number is basically only useful when comparing similar alloys.
Next, keep in mind that a BHN number is completely relative. It is not only possible but likely that two different alloys will have the same BHN reading and each will behave/react differently in the same load based on what is in the alloy. A BHN number is basically only useful when comparing similar alloys.