I had the .50 cal DC mould done in brass. Much heavier than aluminum. I sprayed them well with a moly bullet spray by Lyman.
I really like the brass blocks for heavier bullets. I do have a .50 cal. Aluminum mould by Lee among with MANY other Lee aluminum moulds, but prefer my iron Lyman moulds to those.
I am sure you will be happy with Accurate Moulds aluminum blocks. Beautifully cut and finished.