I don't know Sako's gun, but I know the cartridge very well, and I have shot quite a bit with it in the last twenty years.

It seems to me that the 500 Jeffery has become a cartridge en vogue, whereby the cartridge 460 WBY-Magnum is still demonized despite being a much more versatile cartridge than the 500 Jeffery. I can compare because I have rifles in both calibers, rifles that I regularly used for buffalo and elephant hunting.

As an aside, I doubt a majority can handle well the cartridge 500 Jeffery, especially with the full load. I was able to determine this after I had some experienced hunters shoot with my rifle. Nobody fired more than one shot. That explains why used rifles of this caliber are regularly offered.