Awf,
No the Pedersoli guns are not restricted to BP only. I tend to agree with Kenny, 45-70 is a good place to start in BPCR chamberings. You won't have so much money tied up in high dollar brass, near custom prices fer dies, etc. that way. And you may find that it's not the game for you and that money will come in handy if so. Also, if you find that this is yer passion, you can always have yer gun rechambered later. :-)