I would welcome anyone with a 1900/1902 to 'measure' their toggle tension so that I could compare it to mine...
Easy enough to do: Take a 9, 10, or 11 pound weight, tie a piece of string to it, tie the other end around the toggle of an unloaded, cocked, un-magazined 1900 and hold it by the barrel [barrel pointing up] with the weight hanging down and see if it racks the toggle back to the stop...