[HuntAway]

I suppose this isn't the brightest question(s) but here it is.

At the moment the projectile leave's the barrel, is that the fastest it will be and from there on decrease in velocity? Or will is maintain muzzle velocity say out to 50 yds or so?

Just currious that's all.

Thanks

HA

 

[papajohn]

Depending on the barrel length, velocity might actually start dropping before the bullet leaves the barrel! Various experts have said that with most 22 LR ammo, a barrel over about 17 inches reduces the velocity. It's a matter of the pressure being exerted on the base of the bullet VS the friction of the barrel.

Barrel length aside, the bullet starts slowing down the instant it leaves the barrel. The bullet's momentum and the gas behind it launch it into the atmosphere, and the air it encounters exerts resistance, regardless of the bullet's nose profile. Pointed bullets are affected less, but all are affected as soon as they leave the gun. If your bullet hits dead-on at 25 yards and higher at 50, it means the gun's sights are set so that the bullet is rising out to 75 yards or more. Bullets don't climb unless they're pointed up.

If you point a gun level to the horizon, and fire it at the same time you drop the same weight bullet from your hand, both will hit the ground at exactly the same time. Physics involves laws and rules, and they can't be bent, negotiated with, or changed, regardless of what some advertisers would have you believe.

 

[HuntAway]

Thanks for that papajohn. Sort of what I figured but I've never seen anything on it.

HA

 

[M700]

Isn't it kind of amazing to think of accelerating a little chunk of metal from zero to 2,000 fps, 3,000 fps or more in only a 2' long tube? That's some pretty neat stuff when a fellow stops to think about it.

 

[papajohn]

Agreed. Think of the stresses involved, and the precision required to make a perfectly concentric, properly balanced, aerodynamic projectile. Not to mention cutting even grooves in a hunk of barrel steel at the proper twist rate to stabilize the slug, allow it to obturate, and yet have an inner surface that is smooth enough not to tear the bullet apart as it accelerates from zero to 3500 fps in a span of a couple dozen inches.

We live in amazing times.

 

[swany]

Easiest way to get the bbl speed and propulsion is to get a pea shooter, try to spit a pea out of your mouth without the bbl then with. Then get a blow gun and shoot some relative. ;D

 

[Halwg]

It actually IS rocket science!

 

[swany]

Hal gets an A in Physics. ;D