Comments by "" (@neutronalchemist3241) on "Ask Ian: Analyzing the Savage Rotating Barrel (at 7500 frames/sec)" video.

  1. it's quite simple actually. Had the parts still been completely locked, the moment the bullet left the barrel and the pressure dropped to safe level. Then there would have been NOTHING LEFT to open the action afterward. If the slide is the only moving part, it's quite obvious that the slide must start moving before the bullet leaves the barrel, to have enough residual kinetic energy to complete (ore even to begin) the cycle. It's not like the pistol can store energy somewere. On the other hand, the momentum of the recoil (equal and opposite to the one that pushes the bullet forward) MUST be MUCH stronger than the one that makes the bullet rotate (and so, for reaction, the locking one) OTHERWISE THE BULLET WILL NEVER LEAVE THE BARREL. So that momentum can't, in any case, lock the action.
    9
  2. Just like tilting barrel, and many pure blowback designs (IE the Beretta, from 1915 to present days) have not a fixed barrel anyway.
    1
  3. The Savage 1907 has a CW rifling, so the bullet is forced to accelerate rotating CW and, for reaction, it imparts a CCW force to the barrel. Since the barrel must rotate CW to open the action, that contrast with the opening. However, since the recoil momentum is MUCH stronger than the rotating one of the bullet (otherwise the bullet will never leave the barrel) that can't lock the action.
    1