If the noise occurs on both channels then antiskating and bad pressings are unlikely to be involved. Those problems tend to create one-channel noises.
Distorted musical peaks could indicate an overload, but this should never happen with a Blackbird feeding an A308's MM inputs unless the MF has gone bad somehow (pretty unlikely).
A buzz or static-like burst in synch with a musical peak usually indicates stylus mistracking. The solution includes keeping your records clean, keeping your stylus clean and increasing downforce.
Sumiko's recommended VTF for the Blackbird is not 2.0g. It's a range from 1.8 to 2.2. There is no reason to believe that "exactly" 2.0g is optimal for any particular Blackbird, especially one that's new. New cartridges often require more downforce until the suspension breaks in. Every cartridge is unique and many perform best in the top half of their recommended VTF range even after break-in.
VTF cannot be optimized by using a scale. It must be fine tuned by listening. Eliminating obvious mistracking is the first and most important step, since this kind of behavior will permanently damage every record on which it occurs.
