pellet energy

"nvelkhunter"Note for "force," use this formula:
F = ma
F = Force
m = mass
a = acceleration

When item A hits item B the force of item A on B is equal to item A's mass times how quickly it decelerates upon hitting mass B.
Try not to get confused about acceleration, deceleration is actually acceleration in a "negative" direction relative to the "flight" of an item.

If item A, an air gun pellet, hits a very solid non-pliable item B, a huge anchored hunk of steel, the force will be "high" relative to A hitting a large Jello blob.

Find an explanation of the difference between energy and force here:
http://www.differencebetween.com/difference-between-energy-and-vs-force/

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I think you are describing Impulse here; or Impulse force. F = m (v1- v2)/t. F X t = Ft = m (v1- v2). Hence, F X t = Ft = Impulse

This has implications in tissue penetration.
The available kinetic energy translates into a force to do work in displacing tissue mass. Force is a vector quantity initially applied in a linear direction but translates into a scalar quantity through pressure ie., force per unit area. This scalar quantity can be seen in causing tissue and fluids to be displaced in all directions including blowing stuff back out the entry hole.
Note the amount of stuff that lands near side of the pumpkin in my vid of a .25 Predator hitting a pumpkin.

http://vidmg.photobucket.com/albums/v392/Kyogle/.25%20Predator%20hits%20pumpkin_zpsasxvfmxc.mp4

In the case of an expanding pellet the average area through which the force is applied is greater than that of a pellet which does not expand. Hence the "time" factor over which the velocity is reduced to zero is also less and the pellet comes to a halt in a shorter distance
- compared to that of a pellet that does not expand and therefore takes longer over a longer distance to translate its momentum, in a linear direction, into force and into impulse force pressure /unit area. The result is less lateral tissue displacement - resulting in deeper penetration. ... I think. If you want penetration select the pellet which gives the highest momentum and least expansion ............ Kind regards, Harry.

Yrrah did you ever compare any other pellet B/C besides the JSB King and Heavy with your Labradar? I searched but did not see anything else.

"blackdiesel"Yrrah did you ever compare any other pellet B/C besides the JSB King and Heavy with your Labradar? I searched but did not see anything else.

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Yes, I have run tests on Benjamin .25, Predator Polymag .25, H&N Baracudas as well as the Kings and Heavy Kings. The Heavy Kings are out on their own for BC from my two barrels. The Baracudas just shade the Kings and the Benjamins are right in there. The Polymags are lower but have as good accuracy to 50 and sometimes 70 yards but they are a purpose built expanding pellet for the smaller pests and game and the very best for their purpose from my rifles; less penetration and massive damage in soft tissues, I love them.

As I shoot benchrest I have done a lot of radar tests on the .177 pellets most used in the International 25 m game. I shot in, and was in charge of power testing for the recent World Championships, so had a first hand look at the pellets used by shooters from the 15 countries.
So far as I recall every one of the 90 shooters used JSBs ; 7.9 gr Express, 8.44 gr Exacts and 8.44 gr Exact Premiums, 10.34 gr Heavies and a small number of 13.43 gr Monsters in the HV class. 
I had and have since, repeatedly tested all these plus .177 10.65 gr Baracudas and a few others including the 7.3 gr JSB, Short Predator Polymags and the Piledriver 21 gr .177.
In order best to lowest BC: Piledriver way out in front, then 13.43 JSB, 10.34 JSB Heavy, then 8.44 Exact; - then Baracudas, 8.44 JSB Premium, 7.9 Express and Short Polymags have little to choose between them for BC. I used the RAW TM 1000 and two different barrels, LW and FWB.
Have also tested a few of the .22s.
But I only write about a fraction of the tests I do. Most of it is done for my own interest. I share what I think others may find relevant .
I am pretty busy with other things presently but when it slows down I might dig out the .25 data on the others. ... Best regards, Harry.

Ok thanks. Looking forward to it.

One of those rare occasions where it might make sense to use the unit 'slug' ;-)

The slug is a unit of mass associated with Imperial units and United States customary units. It is a mass that accelerates by 1 ft/s2 when a force of one pound (lbF) is exerted on it. One slug has a mass of 32.174049 lbm or 14.593903 kg based on standard gravity, the international foot, and the avoirdupois pound. (shamelessly plagiarized from Wikipedia)