Springer anti bounce experiment

[NickG]

My 21 mm tx tune has evolved to the point where I have the stroke / piston weight / transfer port/ spring ratios optimized, and when utilising an O or X ring the cycle is soft.
The last improvement to the tune which I use in my target gun has a synthetic piston ring to seal, and offers so much less friction that it makes 0.5 fpe more power which is great as I can use less spring , however the cycle becomes harsher. In an effort to combat this , I remember reading the theory that parachute seals make a softer cycle due to their braking effect when the body of the seal expands at the point of bounce, so this got me thinking if a similar set up would work for my tune.
I have constructed two pistons, the first is based on the BSA Idea of a sliding nose with a buffer behind, in my case the buffer is two O rings that expand to grip the cylinder walls and hopefully slow the bounce down.
The second is a dead blow hammer style affair, with a sliding weigh , or filled with lead shot.
https://photos.app.goo.gl/h36jH3XxA9Wg32nL9
https://photos.app.goo.gl/uashiGtHeDqxB19N7
https://photos.app.goo.gl/iwLgrHRddcizSxxZ7
I have two actions built with the same spec Making the same power for back to back testing so, watch this space .