'Scuse me, I have a problem understanding this issue of a Paradox having less recoil than a bore rifle all things being equal.
1. A Paradox has less friction in the smooth section of the barrel.
2. Less friction means either:
2.1. Bullet will go faster with same amound of powder
2.2. Less powder is needed to start the bullet with the same velocity.
3. In 2.2 the pressure will also be lower, allowing to make barrel thinner and gun lighter.
4. Provided that recoil is function of Newtonian action-reaction law, same charge (2.1) = more velocity out of Paradox = more work (mass by velocity) produced by the Paradox: there's also the same total amount of powder gases, and probably more leftower gases at muzzle in the Paradox (less time in the barrel for them to burn).
5. All of 4 = more, not less recoil out of Paradox with 2.1.
6. Now, in case of proportionally smaller charge in Paradox (2.2), there's same work (same velocity), less powder gases in Paradox, and similar amount of leftover gases at muzzle = less recoil and pressure in Paradox.
7. But same velocity and less recoil with same charge? Something doesn't add up.
Query: what factor am I missing?
