Hopefully you have got boxer primed ammo but I would never turn down Berdan primed cases. They are a breeze to load, Just one step extra to decap instead of running cases into a FL die and decapping in one pass as you do with boxer primed brass.
I reload Berdan primed Kynoch brass for my 404 Jeffery and have made up a two diameter decapping pin out of a tough steel pin I happen to have, one end fits a standard decapping rod with any sizing button smaller than .423" and the other reduced pin end goes into one of the twin flash holes in the brass case. Case in press shell holder, ram up and then insert the rod and pin into a flash hole and a tap with a tack hammer and out pops the Berdan primer. No mess with using a hydraulic water decapper or one of those hook devices which can often damage an anvil in the primer pocket if not careful.

Just use the standard large rifle primer arm on the press to seat new primers (the primer tube magazine won't work with the larger diameter Berdan primers but hey you don't usually load hundreds of big bore cartridges at a time so placing a primer on the seating arm one at a time is no big deal.

Compared with boxer primed brass, yes no denying Berdan primed stuff does take a little extra time but not so much that I'd turn down Berdan primed brass if available for any of the big bores.

Of course the other part of the equation is getting the Berdan primers, no problem here in NZ, RWS Berdans available all the time and often Kynoch too.

You'll be pleased with the RWS brass, it is damn good stuff.