If you reload you can buy these bullets and make the ammo or buy the kit and make your own bullets.
Bullets 44cal: http://www.midwayusa.com/viewproduct/?productnumber=257446
Bore lapping kit: http://www.midwayusa.com/viewproduct/?productnumber=646612
You will want to read this article on firlapping on 'Gun Blast'.
http://www.gunblast.com/FerminGarza-Firelapping.htm
...Jimbo