.577 minie balls?

[jmoore]

Just had a thought. Hornady Grain Plains .58 caliber bullets. The front diameter is large enough that it requires a fair amount of force to start down the bore of a rifled musket. The rear portion of the bullet is smaller-more or less bore riding rather than groove sized for better alignment whilst starting. Thick skirt, too. Don't know why it wouldn't work well for the Snider.

And for some reason, no photos found of the Hornady bullet, even though it's my favorite accuracy projectile for the .577 and .58 rifled muskets.
So here's a random photo of other choices: