Yes, a Bi-containing core makes the ball spin farther, with greater accuracy. Canada also joined the growing number of countries banning the use of lead for shooting over wetlands and more countries in Europe and elsewhere are considering a similar move. In the US, Winchester make Bismuth-loaded cartridge available through their nationwide network. Look up the Winchester site. Keep in mind that Bi helps solve Pb-related toxicity problems arising from solders and pastes.
New compositions are perfected, more appear regularly.
In case you have not noticed, we are rather proud of our element.