A very good assessment of the reaction of pistols due to the initial movement of the bullet in the barrel. Additionally, the sights of a pistol and the bore are not in parallel alignment. The sights must be adjusted to compensate for this initial "jump" of the pistol. In virtually all cases the muzzle will be pointing lower than the sight alignment to allow for the initial muzzle movement as the bullet starts to move. A very good example of sight compensation is the Colt Single Action Army. Virtually each caliber had a different height front sight. The pistol chambered in .45 Colt had a very high front sight, and the pistol chambered in .32 WCF had a stubby front sight. This was a factory correction for the bullet induced muzzle jump. The heavier the bullet, the more the muzzle will rise initially upon firing.
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