Posted on 02/16/2017 8:49:12 AM PST by w1n1
James Yeager of Tactical Response demonstrates how different projectile weights affect overall sound suppression, and he uses a YHM Phantom. Maybe suppressor owners already know this or not, its worth looking at how the higher grains affect the sound. The higher the grain the quieter it got, simply due to the velocity not the weight. Very interesting video! Check out the footage here.
Heavier projectiles are slower.
Greater weight means lower speed needed to achieve same energy on impact.
Weight and velocity of projectiles are only parts of the equation.
The real questions are:
Is the projectile velocity faster than the speed of sound?
How much energy is in the expanding gases behind the projectile?
How capable is the suppressor of diffusing the energy of the expanding gases so as to lower the sound signature when the gases exit the suppressor?
I came here to say the same thing and add the mechanics of the firearm.
Is it sealed, a revolver leaks gas and will be louder.
An automatic will be louder than manually extracting and loading the next round.
“How much energy is in the expanding gases behind the projectile?”
Concomitant question:
Does the rate of burn match the barrel length?
Yes.
Considering projectile weight v. velocity is a grossly oversimplified way to look at the question.
Very heavy projectiles can be very quiet.
bkmk
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.