During the German police tetst they shot this 3.3 gram projectile 4 times into a 15x15x20 block of gelatin. The Safety Slug had a hit energy of 457 Joule. Complete energy transfer happened in less than 10 cm.
That’s all I have additional on this round.
JPeelen also mentioned this “GSS” 3.3 gram projectile. Probably it was indeed a Glaser Safety Slug, and maybe someone made a mistake about the weight.
I can not imagine such a light bullet will recycle a pistol’s action without producing enormous gas chamber pressure.
The problem with these kind of tests is that the details are always ‘confidential’ for the next 10 to 20 years. By the time it is declassified, original documents are lost, the cartridges are not around anymore, and the scientist have other jobs or are retired. And now, after 40 years, everything is destroyed, and the retired workers even have passed out.
I like to do some research on the developments of certain ‘police’ ammunition types, but it is not an easy task! ;)