Could anyone tell me the pressure in factory ammo for the 9.3x62
Thanks
Jon

This doesn't answer your question, however max CIP pressure is 340 MPa which is 49300 psi.

I don’t know about any particular manufacture but it seems that the standard max pressure for this round is 56565 psi. Measured by the Piezo CIP method (Quickload info).

quote:

Originally posted by oldun:
This doesn't answer your question, however max CIP pressure is 340 MPa which is 49300 psi.

Seems like we have a discrepancy here Oldun. I wouldn't know which info is right.

Thanks. Was looking at the safe pressure for in a G2 Contender. One may order a 30/40 Krag barrel which operates at40,000+

Loadtech calls it 56550. The site below has it at 57cip(piezo) and 47cip(crusher)

http://kwk.us/pressures.html

quote:

Originally posted by ramrod340:
Loadtech calls it 56550. The site below has it at 57cip(piezo) and 47cip(crusher)

http://kwk.us/pressures.html

and Hodgdon websites show loads to 47-48,000 CUP.....

quote:

Originally posted by CARNE:
Thanks. Was looking at the safe pressure for in a G2 Contender. One may order a 30/40 Krag barrel which operates at40,000+

The 9.3x62 uses the same case head as .308/.30-06/.270, etc. The SAAMI or other standard is irrelavent -- it will work at the same pressures as any other cartridge on a similar case head so long as the action it is built on is adequate. I can't imagine using a Contender frame for a serious hunting cartridge, but that is due to its configuration, not its strength (about which I have no idea).

quote:

The 9.3x62 uses the same case head as .308/.30-06/.270, etc. The SAAMI or other standard is irrelavent -- it will work at the same pressures as any other cartridge on a similar case head so long as the action it is built on is adequate.

Yup...for sure!

If your 9.3 X 62 is built on a modern bolt action such as M-70 or M-700 or many of the M-98 actions, I'd not be too concerned with loads exceeding the Hodgdons data by about two grains......this should add about 100 FPS if it's worth the effort in your eyes.

Not so fast. The web is thinner in some European brass and 65,000 psi like the 270 would be a very bad idea, unless you like tossing brass after one load.

My two reference sources say 56,000 psi plus or minus. I wonder if the 49,000 number was pre-war for sensitive powders of the day?

quote:

Originally posted by MickinColo:

quote:

Originally posted by oldun:
This doesn't answer your question, however max CIP pressure is 340 MPa which is 49300 psi.

Seems like we have a discrepancy here Oldun. I wouldn't know which info is right.

Hi MikinColo.
I can't say which if either figures are right. The figures listed by me are from, VihtaVuori Oy Reloading Manual 1995, p188. Since reading your comment I have checked the figures and yes, at that date, the pressures for the 9.3x62 read;

Max. pressure CIP pressure: 340MPa (49300psi)

It is possible that the figures have been revised since 1995, but I don't know that that is so.
Looking through the manual, where both SAAMI and CIP pressures are quoted, CIP pressures are lower, eg for the 30-06

Max. CIP pressure 350MPa (49300psi)
Max. SAMMI pressure 50000CUP/60000 psi


Are there any American pressure figures for the 9.3x62? I don't know of any SAAMI standard for it.

I have made every effort to quote figure accurately but the usual caveats apply.

The above listed 49,300 psi for CIP is actually the old C.U.P. (copper crusher) value. Today it is listed as 49,300 C.U.P.

SAAMI lists 57,000 psi based on piezoelectric transducers.

Both are correct. Just different methods of measurement. Most of the older copper crusher measurements are listed today as CUP. Most piezoelectric transducer type measurements are listed today as psi.

Both the above figures are MAP (Maximum Average Pressure). Those are not the same as "maximum allowable pressure". The MPLM (Maximum Probable Lot Mean) is the pressure for with a rifle should be designed. Almost all listings of "pressures" give the MAP.

Larry Gibson

Current CIP MAP for the 9.3X62 is 56,565 PSI, and CIP's old crusher standard was 49,300 CUP.

You have to be careful with the age of CIP standards because of the above. Like everyone else, they've converted from crusher to piezo transducer. What gets confusing is this: because the CIP's old and new pressure standards are both stated in BAR (1 BAR = 14.50375 PSI), both are commonly referred to as PSI when converted, but the old standard is copper crusher, so is actually CUP, not PSI. Old standard for the 9.3X62 of 3,400 BAR X 14.50375 = the 49,313 PSI Oldun referred to, but is CUP (crusher, CIP protocol). New standard is 3,900 BAR X 14.50375 = 56,565 PSI, which really is PSI (piezo transducer, CIP protocol). The pressure standard is the same. Both are the same pressure, measured using different yardsticks.

Worth noting that SAAMI protocol CUP and CIP protocol CUP are NOT the same. Among other things, CIP's crusher method uses a drilled case, while SAAMI's does not. Same with the piezo method.

Well explained.
Different methods give different readings - CIP vs SAAMI.

Warrior