BABore,
I rechambered my CZ550 from a 458WM to 458 Lott about 2 years ago. Personally, I find the CZ very comfortable to shoot due to its weight. As a 458WM the CZ's are prone to feed problems (esp with Winchester 510gr soft points), I converted to 458 Lott basically to get more reliable feeding. Stocks can be prone to cracking as were the ZKK 602's, so I've added a second cross-bolt to avoid this (some add 2 additional cross-bolts). Otherwise great rifles...
Con