I have acquired my Grandfather's flintlock. Its a Thomspon Center Arms .50 caliber. I have all the materials to go to the range. I remember shooting it with my Grandad when I was young, but he's gone now and I don't remember the amount of charge. I have two cans of black rifle powder,one marked with a sharpie "4" and the other "2". If I remember correctly, the 4 is for the flash pan. The ammo I have is spear round balls. How much powder do I need to charge the bbl to fire the round balls? If the intsruction manual didn't accompany the rifle where can I get this recipe info? I'd like to practice with adequate loads for deer so I can hunt with it next year. I'll allow myself a year to practice. Thanks for any help and info.