I like shooting some pretty heavy sabot loads and BH209 is much easier to shoot all day and clean later. If you are shooting 300gr bullets in a 50cal then you may really like it if you are looking for good fps. Then you start needing less BH209 compared to T7 to get the same fps. It burns more progressively like a smokeless but not quite a smokeless. No other sub burns like BH209, so there is a learning curve.

Real Swiss though with a conical is hard to beat with just 60-80grs.