I have a cartridge I have had for about 20 years that I need more information on. At the time I got the cartridge I wrote “Keberst .338/.416 Rigby” on it, but I no longer remember anything about this round. It has a GM pointed FMJ bullet and a very flat head without any headstamp.
Does anyone have any details about this round? Who is Keberst? Is this the same round as the .416/.338 U.S. NAVY-HASKINS SNIPER?