birding-aus

You won't hear it coming

To: Bill Stent <>
Subject: You won't hear it coming
From: Carl Clifford <>
Date: Tue, 26 Feb 2013 10:23:03 +1100
Silencers are only effective if you you use low velocity (sub-sonic) ammunition. If you use normal high velocity rounds, the silencer will reduce the sound level of the muzzle blast, but will do nothing to reduce the noise from the projectile breaking the sound barrier. The average muzzle velocity of a .22 Mag is around 580 metres/second (1.7 times the speed of sound). The most common calibre weapons that would be used for feral animal control would be the likes of .270 and .308 Winchester, which scoot along a fair bit quicker than the .22 Mag and have much larger projectiles. The larger and faster the object breaking the "sound barrier" the more noise.

I don't know who came up with the idea of silencers for hunting long- arms, but I think they have been watching too many spy movies.

Carl Clifford


On 26/02/2013, at 9:47 AM, Bill Stent wrote:

I'm not a shooter, but I have fired a .22 magnum with a suppressor in
Norway, where they're compulsory within some distance of
accommodation.  Can't say it was much quieter than the normal sound,
to be honest.

Bill

On Tue, Feb 26, 2013 at 9:13 AM, Carl Clifford <> wrote:
NSW's doughty little nimrods are worried that the sound of gunfire in National Parks will disturb other users. So concerned, that they now want to be able to use silencers on their firearms. http://www.smh.com.au/nsw/hunters-have-silencers-in-sights-20130225-2f238.html

Aren't they kind.

Carl Clifford
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