Quote:
Originally Posted by eastwest2300
Dude, I was shocked, I mean I just got mine, and its never been fired, and to see the bolt dirty was just a surprise. I guess you live and learn.
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Many mfgrs test fire them at the factory. With some of the better quality BCGs, they are proof fired with a high pressure proof load, then magnafluxed...those are marked HPT and MPI (High Pressure Test and Magnetic Particle Inspected).