I am having a hard time in locating some dealers who sell 50 caliber lead bullets for my sharps rifle. I wanted to purchase a few to see how they perform in my gun before I purchase a casting mold. Montana bullet company does not answer their phone and I have not received an email back yet. They seem to have a lot of bullets to choose from but I am just about to give up on them. I am looking for a 500 to 600 grain bullet with a diameter of .510 and .511. I know Buffalo arms sell a few but our there any other companies sell theses type of lead bullets.