FX Two questions relative to Impact M3

The two questions...

1) Given the weight of the Zan BR100 pellet (56 gr), has anyone tested or seen a difference between the stock free-floating FX barrel setup with a CF sleeve, and shooting them with the barrel tensioning kit installed?

2) In either of the above configurations, is there enough data in yet that the BR100 has a particular velocity that is surfacing as a known good starting point for accuracy tuning for 100 yard BR?

I've searched but haven't seen a lot of chatter on BR100 testing data.

Thanks,

Chuck