I saw that Holland & Holland check trigger pulls with actual iron weights, not a pull guage like most of us have.
The method you mentioned is standard operating procedure for any quality triggersmith and is not particular to H&H. While I am certain that many modern smiths are moving to the digital arena most of the better triggersmiths will all use the standard lead weight methods. The reason for this is simple, the use of actual dead weight is not effected by any torque that might arise when using a digital measuring mechanism.
JRH
