I like all the cartridges in the Holland & Holland series, meant 300 H&H Magnum, 375 H&H Magnum, 400 H&H Magnum and the lesser known 465 H&H Magnum. The appeal but lies more in the design of these cartridges with their beautiful slim conical shape of the cases and also the aura with which they are connected.
What is the advantage of some of these cartridges compared to other cartridges ?
Let's exclude perhaps the cartridge 300 H&H Magnum and in particular the 375 H&H Magnum, latter a cartridge that has become inseparable from hunting in Africa, but all the other cartridges from Holland & Holland, especially the cartridge 400 H&H Magnum, must be used in rifles from Holland & Holland or other expensive weapons. So where is the advantage of the cartridge 400 H&H Magnum compared to the cartridge 416 Rem Mag, the latter being much more available and above all in cheaper rifles. Ballistically there may be some advantages between caliber .411 and .416, but I am not sure if they are relevant for hunting. The alleged problems cited with the cartridge 416 Rem Mag are only a question of loads. As far as pressures are concerned, the same pressure is required for the same performance as long as the size of the cases and their shape are more or less similar.