I love the idea and the actual shooting of the "full power" SSPs, but my increasingly weakening arms (being investigated now) make me shudder at the thought of priming them. Real shame as, on paper, the SSP has to be the perfect system......recoilless, self-contained, consistent, which is obviously why so many chased the dream. But, now, a 10m match rifle with the correspondingly lower effort........
And I've thought for years (as I love my HW40 pistol), that a carbine type rifle based on the 40 with, say, 7 to 8ft.lbs output and reasonable priming effort, would make a beautiful little, highly accurate, informal target / short range hunter.