Dunno mate. But signs on brass are the last resort method of inferring pressure for exactly this reason.
Pressure signs highlight what the weakest link is and you know that if you push it, that's probably gonna be your first point of failure. But it doesn't give you a reliable indicator of what actual pressure this is happening at.
Anyway, your PRC will deliver that kinda performance without wringing the piss out of it - with a cooler burning, temp stable extruded powder.
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