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I am making a shooting rest for my high power rifle and I would like to have a damper take most of the recoil energy so that the shooting rest doesn't move back or up when shooting.

I attempted to calculate what damper would be appropriate for this but I am getting results that don't seem realistic. For example, according to my calculations, a damper that is rated 100lbs and has a stroke of 7inches would only absorb 1.6% of the muzzle energy. A damper that is rated 250lbs and has a stroke of 17 11/16 inches absorbs 10% of the muzzle energy? I must be doing something wrong...

Here are some numbers:

Muzzle energy (of the projectile) 3502 ft-lbs.

Rifle mass: 8 lbs.

Questions?

What size damper should I use?

How much of the muzzle energy actually goes into felt recoil?

What is the formula for multiple dampers and springs connected in searies or parallel?

Thanks

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# Damper Selection

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