The thread below is one I have posted up before - a fella in the US who makes his own BR rifle action from scratch.
http://singleactions.proboards.com/thre ... fle?page=2
Text from the thread above:
"The 25 Dart cartridge has some unique history. It was designed by our late friend Homer Culver in the 1950’s. It’s formed on 220 Swift brass (shortened / improved) and it saw competition back in the day. I can’t say how many he chambered but I believe more than ten exist."
25 Dart - Martin action
25 Dart – cases formed off of Norma 220 Swift. Necks turned to 0.281”.
"We hadn't shot our Dart in over ten years. And even after a decade boutique 25-caliber bullets are still limited. So we went with our standby 75 grain Sierra on top of old IMR 3031. Some may poke fun at the components but they routinely put us in the 2’s when conditions held (the gun has even nosed into the 1’s a fair number of times)."
Marcus
