In 1823, the first shell guns were invented by the French General Henri-Joseph<br> ... For guns they were latterly fitted with a wooden disc called a sabot, ...
http:/en.wikipedia.org/wiki/Shell_(projectile)


When The Sabot Fits, Wear It (say-bow)......... Means shoe in French.
In 1985, when Del Ramsey invented the modern muzzleloading sabot the velocity and windage limitations attributed to conical projectiles in muzzleloading rifles vanished, and the need to externally lubricate them went down the drain with the last Pine-Sol scented batch of "Bore Butter."