Heavydane,
Thanks for the info if I could get these darn pics to load maybe someone could tell what the proof marks mean

400NE,
Thanks for the reply, after followiung this thread and on another site I read about a gent who used an Oehler Model 43 Personal Ballistic Laboratory, it used strain gage based technology to measure hoop stress and internal ballistics. I have since backed off on such high pressures, I think 450 #2
balistics would be more than enough.

Bonanza,
I talked to a fellow named Jason Simpkins about CZ converted guns sounds like he might be related.

If anyone could help with these pics I would be indebted
John