Elk Whisperer (Super Moderator)
On the left is the "new" Lyman 429421, a mould from 2012 and on the right is the "original" 429421, a Lyman mould from 1954. They seat the same, crimp the same, weigh the same, shoot the same but aren't the same.
I have been keeping them separated since I got the new mould, just to clarify. I just needed a double cavity 429421, so, I got one and for a while, maybe longer I never noticed the difference.