I'd say this is more because of availability and price than it is for performance. You can walk into almost any gun store, walmart, sporting goods shop and you will find 300 win mag ammo and rifles on the shelves. We as Americans have this wierd obsession with 30 calibers. Even when presented with clearly better ballistically performing cartridges, people will still claim their 300 win mag is better. Does it do a certain thing well? Sure it does. Are there better performing cartridges out there? Sure there are. People use it as a comparison because most people have a general idea of what its capable of. But when it comes to the "fastest, flatest, new cartridge" the 300 win mag gets left in the dust. I've owned one and I enjoyed it. But I wanted something ballistically superior.