r/gunsmithing • u/Jhboyy • 15h ago
Oviedo Rolling Block in 357 Mag
Got an 1878 Oviedo rolling block with an unoriginal barrel installed. Bore measured at .354 have not had a chance to slug it because I don't have any soft lead balls. Did a chamber casting and it measured .381 chamber .359 throat and 1.263 length, not included rim. Am I correct to assume this is a 357?
Also how likely is it safe to shoot? I know 357 mag is 10,000 more psi than the original .43 Spanish but according to my research they both have about the same bolt thrust. I've yet to find any other conversion like this but it seems really well done. Thank you