In fairness if it was anything but a silenced rifle (which it is not) the PH would take no notice as so many of them have a double (also clients) I have dry fired my .270 with out a mod and it swings/freehands so nice and I would have no problem free shooting it as with the plastic stock it is quite light.
Also with the really big stuff the PH's let loose with their cannons after the client has fired with no quarter.