Yeah, it is. They all still have a very fast-opening, fragmenting front end, but the jacket thickness in the rear varies some, depending on the bullet and its "normal" applications. One reason the 180 BT got the super-heavy jacket in the rear is that people kept insisting on shooting elk with them, even though Nosler suggested the Partition was the bullet for that purpose. It's also the reason the .338 had the super-heavy jacket from the bullet's very beginning in the early 1990's.
