"Muzzle rise is the effect of the recoil force being applied above the point of resistance and since there is essentially no effective resistance applied to the recoil force until the slide bottoms out, there is no significant muzzle rise until that point."
That is what is not being understood. Recoil is the "equal and opposite" force resulting from the movement of the bullet in the opposite direction. It doesn't depend on the slide hitting or bottoming out on anything. That would be like saying that recoil of a rifle depends on the butt striking the shooter's shoulder.
The amount of muzzle rise before bullet exit depends on the caliber, bullet mass, barrel time, and other factors, but it is there if the barrel is above the center of gravity of the gun. Even a muzzle brake won't negate it because the brake depends on using the gas that escapes after the bullet exits to slow recoil. Will more of the recoil be seen after bullet exit? Of course, since the motion of the gun has begun and is not easily stopped.
Jim
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