Peter,

"the american line is assampled in the god old US of A, so they should be abel to correct their mistakes right then and there."

You have me there. When you say that the American line is assembled in the "good old US of A", do you mean that the barrelled action is fitted to the stock, or that the whole rifle is assembled from component parts shipped from the CR? I would be amazed if the latter were the case, but I have never had a 550 in my hand, let alone disassembled one.

You are correct that there is no governmental proof in the US, but if the barrelled actions are assembled in the CR, I would think that they are proofed there, but I have no means of verifying this.

All my experience with Czech made weapons has to do with my G33/40 based sporter, my 21H/22F rifles and carbines, my ZG-47 and my ZKK602, which is presently being converted to .500 Jeffery. I am anxious to see how that conversion feeds. After reading the account of the .505's problems, I am a little concerned. However, I don't anticipate taking it in the field after DG, since I have a whole gun cabinet full of alternatives.