Hello all. Been away from the forum for a while. Finally got set up with a lathe and mill, and ready to try a conversion project.

I have a Ugartechea 10ga, that I'm considering for a basis for a .450 #2 NE. It's a circa 1989 gun, and has no third fastener, just double underlugs. It has the Spanish proof mark of a BP inside a shield, which, according to the Directory of Proofmarks means 12, 090 psi. In addition, the flats are stamped 1000 Kp/cm2. Trying figure out what that converts to in psi. I think it's 14,500 psi, but not convinced. Will then have to crunch the numbers to see if the breech pressure is compatible. Any thoughts on this? I've emailed Ugartechea, as to the proof pressure of this gun, but still awaiting a reply.

Thanks,

Jeff