Hi Ed,
There's a couple of answers here. Yes, Berdan cases can be reloaded. It's not worth it, is a HUGE pain in the arse, messy, hard to get components (primers) for and requires some specialized equipment. Something to consider only if you're dealing with very rare ammo that can't be formed from anything else, or purchased elsewhere. No, you can't convert them from Berdan to Boxer. To paraphrase here a bit, they be what they be. As for durability, again, yes and no. You'll find brass that will run the entire gamut of quality, from quite high to frighteningly bad when it comes military stuff, depending on where it comes from.
The two calibers you've cited here are readily available as commercial components, and aren't worth bothering with in Berdan format. Shoot 'em up, save the brass, and sell it for scrap when you have enough. Trust me, life's to short to reload Berdan cases!
Kevin Thomas
Lapua USA