This will work fine for the Berdan primers too. The Berdans have two flash holes, and will allow the pressure transfer just fine. The only problem is that the Berdans have a "fixed" anvil as part of the primer pocket. You would always need to use Berdan primers as Boxers have their anvil in the primer.
I did a thread on converting Berdans to Boxers using a drill to make a new flash hole, drilling through the firing pin mark as a center, the spent primer, the anvil, and the case head. Then I use an awl to pry the primer out.... Works well, and the cases shot well afterwards.
Not sure how to remove the anvil after the primer is removed.
Cheers,
Tim
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