My brother's American in 22LR has the same problem. His shoots well enough for his needs, so he decided not to do anything about it. He is not as picky as I am. Relieving the stock at the contact area will help it shoot more consistantly, but it may not look so good. CZ must have had a tooling problem at some time that produced a bunch of these defective stocks. I suggest that potential American buyers check the rifles for this problem, before they buy, if possible.
The American model, with it's higher level of wood and finish, is a reasonable alternative to the Cooper, Anshutz, Winchester 52, and Kimbers.
I have been tempted to take my Ultra-Lux to the same level of finish as the Kimber Super America. I have restored some old 22 rifles that look more like the higher grade Brownings. With an exibition grade stock, bedding job, a little trigger work, and a high-polish bluing job, I could have a CZ Ultra-Lux Super Chec Republic. (or something like that)
If you want some super-fine gun bluing done, you should contact Mel Doyle Gun Shop in St. Maries, Idaho. (208-245-3006) Mel has done some fine work for me at a great price.
Good Shooting
Jim W.