I have a CZ in 500 Jeffery. I love it, but it took a trip back to the CZ Custom Shop, one to AHR and finally to my local, but excellent gunsmith Kevin Weaver to make it feed and function 100% of the time. It got better each trip, machining the magazine follower to handle the fat 500 Jeffery cartridge was the final thing that completed my little journey. It shoots well under MOA when I do my part and functions flawlessly now. Expect to have to do some work to get it to feed and extract 100% of the time. Also I believe there are two slightly different specifications the Schuler and the Jeffery. I believe (but am not sure) that the Kynoch ammo is spec'd to the Schuler and would not chamber in my rifle. At $20 a round for factory ammunition it's too rich for me, I handload using Jamison brass and have loaded Woodleighs, Barnes and A-Frames and had no issues. I never tried the Norma Ammo. My pet load is the 570g TSX at 2300 fps. Anyway here's my CZ in 500 Jeffery.

Rifle: CZ Upgrade #1 by AHR

570g TSX at 2300 fps 3 shot group at 50 yards (not 100!)

450 lb feral hog taken at 8' in a thicket with my son (he got a bigger one) haven't been to Africa yet with it, soon I hope. I did get a cow elk at 200 yards with it too