My present mob use a standard pax weight but the actual baggage weight. How many of us, or our pax are a standard weight though?
In another era, Air Nauru (Central Pacific airline in the 1970-80's using the 737-200) operated a weekly charter from Noumea, New Caledonia (French), to Wallis island (a French protectorate). The Wallis islanders are seriously big Pacific islanders like the Samoans and Tongans. Morbidly obese is a good description.
Departing Noumea one day at max structural of 53,000 kgs with P&W JD8-17 engines, the 737 laboured to reach 31,000. Unusually long take off run too. In cruise using load sheet weights to set cruise thrust, the airspeed would continually lose ten knots. We would increase to climb thrust to get back to 0.74 and slowly the speed would fall back 10 knots IAS.
On arrival Wallis, I had each of the approximately 80 passengers weighed as they stepped off the aircraft. First female was 135 kgs. Second 110 kgs. Repeat for most of the others. And that didn't count hand baggage which averaged 15 kgs per huge gaily coloured bag.
The French agent at Noumea used standard weights of 75 kgs for male and 65 kgs female and hand baggage not weighed. Turned out we were roughly 1500 kgs over max structural BRW for the 737-200. After that, we convinced the French agents at Noumea and Wallis to weigh each passenger and also weigh the hand luggage.
At Samoa in the South Pacific region, it was common for Samoans to have "cousins" everywhere; including the staff at the check-in counter where luggage was weighed. Frequently one would observe the man weighing the luggage slip his big toe under the scales and lift a bag or suitcase with the usual result the bags weighed less on the scales depending the strength of the big toe. V1 became useless..