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That was covered by the word roughly and that there are a few other bits that affect it.

I do know what you mean. The numbers I posted earlier show it. You get the same bullet going faster and the rifle will push back a bit harder. Can get the same recoil with a lighter bullet going...

Same deal, just throw in your actual numbers.

I don't think you've missed anything.

Look at Core-lokt and the usual packet velocities.

308, 150gr, 2820f/s - mxv = 423k units of momentum

708m, 140gr, 2860f/s - mxv = 400k units of momentum

So about 5% difference = bugger all....

I'm talking exactly the same info as Tim. He just used Einstein's energy equation for particles travelling at the speed of light which is double what we expect normally and leads on to the theory of...

Multiply the mass by the velocity for both projectiles. The bigger result will give you the bigger slap. Divide the result by your rigs weight and that will give you the initial velocity of your rig...

The powder/primer charge gives the energy to the projectile according to 1/2mv2. From this, very roughly, we get the velocity of the projectile. Then as the projectile leaves us on it's little...

This relativity only applies to light projectiles going 3x 108 meters per second. For what we're dealing with we just go for 1/2 mv2.