Here's a pic of one of my CZ's that I used to own that I gave the custom touch...
It's in .458WM and had the following done;
barrel shortened to 21"
cross-bolts fitted
barrel-band sling swivel fitted
fore-end shortened and buffalo horn tip fitted
feeding sorted out
It was a nice rifle - and accurate too. And I loved the magazine capacity :)
I used to load the .458WM rounds to Lott length (due to the mag length) and I got a nice, easy, un-stressed 2150fps with the 500gn Woodleigh PP.