we're certainly willing to test whatever people think is worth looking at.
If anyone has a commercial backspin bolt - or one that they think works - we'll give it a shot.
We'll shortly be asking for test suggestions - and donations of gear or cash for paint. I think that with the resources available on this and other forums we should be able to gear up and test some really great stuff.
For example, this backspin idea - or *GASP* brass vs. other barrel materials....