First off you have to ask........Is BH 209 2F or 3F? It might be different with T7 2F.

I'm guessing when I say this, but maybe this is how it went when they came up with the BH formula. I don't think it's a surprise to anyone that BH 209 is basically a form of smokeless powder detuned to BP velocities with some smoke added.

So, they wanted it to compete with the best sub available at the time. That would be T7. I believe T7 has stretched the velocity difference from real BP as far as they dared go, and still call it a BP sub.

I don't think they wanted to compare to T7 3F, because that's suppose to be for small calibers. They took T7 2F, and made it just a bit better without throwing up any red flags.

BH209 has many other advantages besides velocity. No swabbing, no crud ring, more consistent, and doesn't absorb moisture. They could have boosted velocity much higher, but kept it safe instead.

My .02