Based on my experience shooting the 200g SST, it seems the published BC of 0.265 is relatively close.

An example of how this BC is kinda verified is the 450 yard jug thread.

Using the BC of 0.265 the ballistic program calculated a zero at 450 yard would require the 200g SST to be 19.79" high at 100 yard. The elevation dial on the scope was turned to 19.75 moa, and the shot taken. Had the BC of 0.265 not been somewhat close to accurate, the hit never could have been made.