Thought I'd share this with the other reloaders here. Their .510" 750 gr Amax have had the (A) Aluminum tips for as long as I've known about them.
Now, it appears they are making their smaller caliber "Match" Bullets (Projectiles) with an Aluminum Tip. They also mention, that they recommend using a specifically matched seater stem, for loading their bullets.
This is a fairly good video from Hornady https://vimeo.com/332099503 and https://vimeo.com/331018137