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Measuring handgun recoil

2.1K views 14 replies 9 participants last post by  AK103K  
#1 ·
This might be a dumb question but, Is there some type of math problem where someone can determine felt recoil on a handgun, without actually shooting the firearm?

It would be nice to know how bad the recoil is on a particular handgun prior to purchasing, without having to shoot it.
 
#2 ·
Yes, such a formula could be made...but it would be complicated.

It would need to account for the amount of powder in the cartridge, the weight of the bullet, the length of the barrel, the weight of the gun, and the geometry of the gun.

The geometry of the firearm would be the hardest part to account for. Felt recoil involves not only the backward push of the burning propellant, it also involves the upward flip of the gun. The gun's center of gravity, it's moment of inertia, and height of the barrel above the center of gravity, and where your hand makes contact with the firearm would need to be known.

Since everyone's hands are a little different, the formula would not be one size fits all.

I've never seen an attempt at such a formula.
 
#4 ·
You can calculate the recoil energy using the same equation used for long guns.

Er = KEb + KEp / Wg,
KEb = Kinetic Energy of bullet = Bullet wt x Muzzel Vel2 / 7000 g/Lb / 64.4
KEp = Kinetic Energy of powder = Power weight x Gas Exit Velocity2 / 7000 / 64.4

Bullet and powder weights are measured in grains
Wg = Weight of gun (Lbm).
The gas exit velocity for centerfire rifle cartridges was measured using high speed cameras, and is typically around 4000 f/s.
Since handguns operate at much lower pressures, I expect the gas exit velocity of handguns to be much lower.
 
#6 ·
That’s a sweet looking revolver.

I’ve never experienced one of the light weight short barrel 357’s but I bought a NAA pocket 380 once. I had to get rid of it because I couldn’t take the recoil. After a half box of ammo your trigger finger would be bruised from hitting the trigger guard so many times.

Prior to that experience I thought all guns were fun to shoot.
now I try to shoot the weapon before I decide to buy.
But sometimes it can be hard sometimes to do that.