They are different for rifle and pistol applications.
http://www.sellier-bellot.cz/en/product/components/primers/They have similar numbers, but different alphabetical suffixes.
I've used about two hundred S&B large rifle primers so far, and they are on the mild end *if* chronograph results indicate anything. Consistency and grouping results are right in there with others.
Then usual intensity and cup thickness differences between rifle and pistol primers aside, large rifle and large pistol primers and pockets are of different heights.
