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Ruger .22 Ft Poundage


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Yes!

First you need to spend £120.0 on a chronograph (still interested)?

Then fire YOUR RIFLE across it with the ammo you use, and write down the result.

Now the sums start, first multiply the velocity by itself (Squared, If you have a maths GCSE)

Forget it now if you don't have any GCSE's!!

Then multiply that by the bullet weight in grains (usually 42'ish) then divide the lot by 450280.

The answer on your calculator is Ft/Lbs.

Glad you asked???

AF

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I should have said above of course that it varies from ammo manufacturer to manufacturer, and bullet type and weight.

 

However, you're not going to see much deviation from those figures.

 

The rifle's going to have very little influence unless you have a very short barrel in which case you may see a slight difference due to length.

Edited by Alsone
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