I'm with Waldog. Much easier to get boxer primed cases and not fool with it. But jack 19512's idea seems like a way to spend some time if you enjoy that.
The reason I started reloading the Swiss 7.5X55 Berdan primed brass was...
1. At the time I didn't have any trouble getting the Berdan primers.
2. I thought the Swiss brass was very good quality brass and just couldn't justify buying Boxer primed brass when I had so much of the Swiss brass on hand.
Now, having said that. I can't seem to find a reliable source for the Berdan primers now and having read so many testimonials about how easy and how well the Winchester 284 brass works out for the Swiss 7.5X55 I have ordered 200 of them. Basically out of fear that the supply of them might dry up or whatever.
If I had a source for the Berdan primers I wouldn't fool with buying the Boxer primed brass for the Swiss 7.5X55 as I am completely satisfied reloading the Berdan primed Swiss brass. I also have some 8mm Berdan primed brass that I wanted to reload but my supply of the Berdan primers are dwindling and I wanted to save what Berdan primers I have left in case I find the need for them in the future for whatever reason.
I enjoyed reloading the Berdan primed brass but I would be lying if I said it wasn't more work or trouble but never the less I enjoyed doing it. Unlike a lot of people that reload I reload for the enjoyment of reloading. Not just to reload a bunch of ammo and then go shoot it up. I take my time and strive for quality not quantity. I found it very easy to reload the Berdan primed brass but others feel differently and that is OK.