It was offered up last year to do a comparative test between silica and plastic BBs...including different power levels, different ranges and different BBs (focus on silica bbs vs plastic bbs). Shooting at different materials (i.e. shooting glasses, goggles, plastic receivers, etc...). Documented, photographed and witnessed by a variety of persons (well known ASC people).
For whatever personal/business reasons...participation was declined and the tests canceled.
Too bad really....in hindsight doing that back then might have gone a long way to save pages and pages of repetitive posts.
Perhaps times have changed and someone else will resurect an attempt to organize such a set of tests again.