I am now curious about the statements that the Swedes always used non-corrosive primers. Since AFAIK non-corrosive primers were not developed anywhere until the late 1920's, Sweden was either way ahead or used mercuric primers. But mercuric primers, while non-corrosive, destroy brass, and I have always heard that the Swedes, even the military, were great for reloading.
I think my statement that the primers are corrosive will stand until I see something more definitive. It seems more probable that the Swedes simply kept their rifles clean, something easy to do when there is no war going on. Also note that many of the Swedish rifles I have seen have several crowns under the pistol grip, one for each rebarrelling.
Jim