I was talking with some single shot rifle shooters this weekend and I was asked about the 408 Winchester cartridge. I had never heard of it. All anyone knew was that Frank de Haas mentioned it in one of his books. When I got home, I found that Mr. Single Shot talked about it in his Cartridge Handbook but he had never seen the round, only the SAAMI specs for it dated 1965. He thought that Winchester was developing this round for the m94 carbine but stopped work on it because Marlin entered the market with their 444 in 1964. The Buttweiler collection has a few examples of this semi-rimmed straight wall case identified as an experimental cartridge.
Donnelly quotes Nonte as saying that the 408 was a bottle-necked belted magnum but I think that Nonte was talking about one the wildcats that was based on the 458 Winchester case.
Does anyone have any further information about the Winchester SAAMI cartridge or the Nonte cartridge?
TIA - JCP