Mystere update: took my 169g Shimmer Star Mystere to the 'range' today. The 'range' is a schoolyard, 500 ft. long, dead flat. I also took some other discs, including 3 Valarie Star SLs (all 175g) and two Star Terns (167g and 168g). I threw the various discs both ways on the range, with rangefinder-measured distances going both ways.
My form is better: I often threw the Terns 300 ft. or more(!), and that's going both ways. The Terns did very well for me.
The SLs were getting 250-260 ft. on average, and were pretty consistent. They're new, so they still have a healthy fade, and over time I expect that to diminish some and hopefully their distance will improve.
It was my hope that the Mystere would be like the Tern, and would get equal to or more distance than the Tern with a Speed-11 rim for easier grip. Unfortunately, that has so far not been the case. While on occasion I would get the Mystere out to where the Terns were, usually if I correctly anny-flexed the Mystere, it consistently was shorter than the Terns. Being new, the Mystere also still retained a healthy fade. In the overall, the Mystere was more consistent with the Star SLs than the Star Terns.
I'll keep working with it, and if they come out with production Mysteres and I can get one in a low-to-mid-160s wt., I'll try another one. But I guess I'm just going to have to live with the Tern's wider rim; the Mystere did not beat the Tern out of my core bag.