B757-200 Basic Weight ~60,000kg
307 Passengers @75kg = 23,050kg
Hand luggage (and there will be a LOT of it if it's a Hajj trip @5kg = 1,535kg
Total 84,585kg
235 pax (charter confgi) is a tight squeeze. No way could 307 passengers be on that aircraft, if a 757-300 then possibly (280 in charter config).
B757-200 MZFM = 83,500kg.
And the weights will almost certainly be significantly higher than that, let alone hold luggage.....
Interesting to say the least!
767-300 - no problem.