While I've been adding to my Gahendra and Martini collection at a steady pace, it has been a while since I added a new type to the collection. However I have just acquired a Roberts Conversion of an 1863 Springfield by Providence Tool in .58 Roberts CF (pic is from seller's listing). As a tilting block action it fits right in with the others and furthers my collection of conversions, which I'm always on the lookout for.....you just got to love the ingenuity behind some of these.
Anyway, the rifle comes with dies and .577 basic cases to be cut and formed. If anyone has experience in shooting this round in such a conversion, I'd appreciate hearing from you on any advice on bullet use, etc. This particular one has what I consider a VG bore, but of course is a very slow twist 3-groove and I assume has the same "issues" on bullet stabilization as the 3-Band Sniders. I look forward from hearing from anyone with experience and thanks.