Advantages are you can now get one.We ran out about a year ago and didn't think we were going to build anymore.Also with this one like on our new loaders there is no need to remove the unit to adjust the primer seating depth.The front of the unit has a cut out in it so if any shot gets in, it will drain out.The fact it is made of solid brass and the primer ram of steel makes for a nice smooth operation.
<blockquote><I>"and the advantages are????"</I></blockquote>
None... if you reload the same hull and primer all the time and have the time and patience to adjust the old-style primer post.
If, on the other hand, you reload several types of hulls with several different primers, being able to adjust the height of the primer post without taking the assembly apart removes a lot of aggravation and saves time. I have index marks on the adjusting nut so I know where to set the height when I change hull/primer combinations.