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Old August 1, 2015, 12:35 AM   #26
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Join Date: April 19, 2012
Location: Western PA
Posts: 3,829
One thing I've noticed is that historical accounts of a silencer's quietness are often greatly exaggerated. Modern accounts are often also exaggerated, but now we have modern measuring equipment that can very accurately measure the silencer's decibel level.

One example is the Delisle Carbine, which was an integrally-suppressed bolt-action .45 ACP carbine used by the British in WWII. Legend has it that it was one of the quietest suppressed firearms ever built, and at the time is was metered at 85 dB, which is far quieter than any modern silencer.

But that number doesn't make any sense, most firing pins alone are far louder than 85 dB; I've seen a test done by Major Malfunction that showed the Model 700's firing pin is 105 dB when dry-fired. This discrepancy was cleared up when Stalking Rhino Industries got ahold of a Delisle Carbine and tested it, and it metered around 128 dB. So it was actually about the same as most modern detachable .45 suppressors that are much smaller.

It's pretty clear that that the 1940s technology used to measure the Delisle Carbine was simply inaccurate. And, like most subjective accounts of silencers' quietness, the witness accounts were also unreliable and innaccurate.
0331: "Accuracy by volume."
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