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Hi,
This post is in regards to 12 Gauge Shotshells.
I was reading this article:
https://www.americanrifleman.org/articles/2015/6/19/subsonic-shotshells/
It was talking about subsonic/supersonic shotshells for defensive/hunting purposes.
What's the difference between subsonic & supersonic shotshells?
Does barrel length play a factor in a quieter shotshell?
It said shotshells that are under 1116 fps don't break the sound barrier (subsonic):
"The speed of sound at sea level and 59° F. is listed at 1116 feet per second (fps). And even though the speed of sound isn’t constant, changes in altitude and temperature, among other factors, can affect that number. Breaking that threshold means the difference between producing a hearty fooop sound and an earsplitting boom..."
As far as an effective subsonic 12 gauge shotshell, it said:
"Consider this: 12.0 grs. of Hodgdon TiteWad propellant in a primed 12-ga., 2¾” Cheddite hull propels a Ballistic Products, Inc., 1 1/8-oz. lead, hollow-point Thug-Slug to 856 fps. from an 18½” barrel. Seems unconvincing, right? At that velocity, the 492.2-gr. slug packs 800 ft.-lbs. of energy, which is about double the energy produced by the much-vaunted 10 mm and more than most 240-gr. .44 Mag loads. Would anyone deem the .44 Mag. as being inadequate for personal protection? Not likely. And, even before expansion, the hulking chunk of lead is 0.725” (+/-) in diameter. Use 14.0 grs. of TiteWad and the velocity increases to 1020 fps, resulting in 1,137 ft.-lbs. of energy..."
Is supersonic just another name for a fast moving shotshell (or round) like the Winchester XPS @ 2000 fps:
https://www.sportsmansguide.com/pro...ster-xp3-slugs-12-gauge-3-300-grain?a=1592563
Your time is appreciated,
Godzilla187
This post is in regards to 12 Gauge Shotshells.
I was reading this article:
https://www.americanrifleman.org/articles/2015/6/19/subsonic-shotshells/
It was talking about subsonic/supersonic shotshells for defensive/hunting purposes.
What's the difference between subsonic & supersonic shotshells?
Does barrel length play a factor in a quieter shotshell?
It said shotshells that are under 1116 fps don't break the sound barrier (subsonic):
"The speed of sound at sea level and 59° F. is listed at 1116 feet per second (fps). And even though the speed of sound isn’t constant, changes in altitude and temperature, among other factors, can affect that number. Breaking that threshold means the difference between producing a hearty fooop sound and an earsplitting boom..."
As far as an effective subsonic 12 gauge shotshell, it said:
"Consider this: 12.0 grs. of Hodgdon TiteWad propellant in a primed 12-ga., 2¾” Cheddite hull propels a Ballistic Products, Inc., 1 1/8-oz. lead, hollow-point Thug-Slug to 856 fps. from an 18½” barrel. Seems unconvincing, right? At that velocity, the 492.2-gr. slug packs 800 ft.-lbs. of energy, which is about double the energy produced by the much-vaunted 10 mm and more than most 240-gr. .44 Mag loads. Would anyone deem the .44 Mag. as being inadequate for personal protection? Not likely. And, even before expansion, the hulking chunk of lead is 0.725” (+/-) in diameter. Use 14.0 grs. of TiteWad and the velocity increases to 1020 fps, resulting in 1,137 ft.-lbs. of energy..."
Is supersonic just another name for a fast moving shotshell (or round) like the Winchester XPS @ 2000 fps:
https://www.sportsmansguide.com/pro...ster-xp3-slugs-12-gauge-3-300-grain?a=1592563
Your time is appreciated,
Godzilla187