I recently spent a little time with one of the new USSG Z98 .270's that was purchased by a local hunter.
Maybe his specific rifle was 'luck of the draw', but I thought it was a pretty nice rifle without any major faults.
Fed without a problem, and the action was a little 'stiff', but the guy said that the more he uses it the smoother it seems to be. Might not hurt to have a gunsmith spend an hour or so smoothing out the action, but even if that was necessary I wouldn't consider it to be a big deal.
We aren't talking about a high dollar Mauser action CRF rifle, but one that costs less than $300.
Chuck Hawks had a review of the Remington 798, which is identical to the USSG Z98 except for the stock. His comments in part were;
"The Model 798, however, is another matter. It is definitely a step up from the Models 700/Seven (and most other rifles on the market today) for big game hunting purposes. The 798 is based on a more expensive, superior action suitable for the most critical applications, including hunting the world's largest and most dangerous game.
If my rifle absolutely, positively had to work in the most difficult circumstances, I'd choose the Model 798 over a Model 700 every time. Its controlled feed action makes double feed jams impossible and will reliably feed a cartridge into the chamber with the rifle held in any orientation, or while being swung to engage a new target. The 798 also has a larger loading port, making a fast field reload easier and more certain. The advantages that make the 798 superior for the most critical big game hunting applications also make it superior when deer season rolls around.
The Model 798 is a great value, even at the full list price. Both the 798 and 799 barreled actions could easily form the basis of a fine custom rifle. In fact, at Guns and Shooting Online we already have a custom stocked Model 798 in the works. If you haven't checked-out these new Mauser based rifles from Remington, you owe it to yourself to do so."
He also did a review in which he compared the 798 (Z98) against the CV Model 550 American;
http://www.chuckhawks.com/compared_CZ550_Rem798.htm