In an Omega, i cant imagine a downside to BH209 other than cost. You can bring down cost by getting it in the 5lb jug. Its roughly $200 from Carlos at Ed's gunshop when its in stock. The Omega breach plug is one of the best OEM plugs for BH209.

A hex head 1/8" drill bit turned by hand will clean the flash channel quickly and easily. A nut driver handle or multi bit screw driver is helpful if you need a little more room under the scope.

A minor negative, is it requires a smokeless CF solvent for cleaning the bore.

Some people claim it does not work with lead conicals but i can tell you it works very well unless the conical is way too loose. The Omega might not shoot a conical well depending on how well the QLA was cut.