For your consideration one Thomas RoundBall to RimFire Vol4 bullet 297 Vicksburg rifle bullet. You will find this bullet to be in excellent dug condition. The patina is a real nice light white color & I do not see a single patina chip. A nose cast sprue can be easily seen with heavy mold seams radiating down both sides of the nose cast sprue. The cavity is a cone. Measures about 0.54 x 1.015 inches. This has been a hard bullet for me to find.
A Vicksburg rifle is a Kentucky long rifle or country rifle rebored to a 0.54 caliber. A good shooter but they did not campaign well.