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Standard Pressure for "IS" is 3400 bar
" for "IRS" is 2900 bar (Rimmed)
" for "I" is 3300 bar
" for "IR" is 2800 bar (Rimmed)

to complicate the issue you also get a 8x57R_360 that uses only a bullet diameter of 8.09mm and is loaded to a maximum of 2200 bar

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None of the above is correct.

The current CIP Maximum Average Pressure (max service pressure) for these cartridges:

8X57IS (rimless S bore) = 3900 BAR or 56,564 PSI

8X57I (rimless I bore) = 3800 BAR or 55,114 PSI

8X57IRS (rimmed S bore) = 3300 BAR or 47,862 PSI

8X57IR (rimmed I bore) = 3200 BAR or 46,412 PSI

8X57R 360 = 2450 BAR or 35,534 PSI

The rimmed 8s are loaded to much lower pressure than the rimless and rimless loading data should not be used.

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"Serious rifles have two barrels, everything else just burns gunpowder."

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