The Thor .451 63 grain aluminum bullets with sabots that are now on the market do not have any plastic tip.
https://www.muzzle-loaders.com/thor-...5-pack.htmlThe
Thor's website lists 4 different aluminum bullets including a 100 grain .458.
https://www.thorbullets.com/services1.html

What peaked my interest in seeing how this bullet weight performs was recently looking at a Taurus Raging Hornet revolver which in turn led me
to come across this video below of a hog kill at 50 yards with a 45 grain Sierra .22 Hornet bullet.

Very lethal head shot at the 1:50 mark which just goes to show how effectively speed kills.