You're throwing a lot of numbers around in an attempt to look like you know what you're talking about. Ballistics and wound cavities are much, much more complic

You're throwing a lot of numbers around in an attempt to look like you know what you're talking about. Ballistics and wound cavities are much, much more complicated than just "more momentum == more deadly". Example: The US military just replaced the .223 with .277 Fury for exactly the reason that the .223 is _too fast_ and doesn't shed enough energy when hitting a target. Furthermore, you're mixing grains (gr) and grams (g). A 55gr (grain) bullet is 3.56 grams. A 0.9oz musket ball is 25.5 grams. So your momentum calculations are (11'067-13'209) grams * m/s for a musket and 3'581 grams * m/s. So the musket actually has 3+ times more momentum than the .223 round. Musket balls are absolutely huge, there are effectively zero modern rifles which shoot a .640 caliber round. The .223 is a very small rifle round. https://www.quora.com/Would-it-be-worse-to-be-shot-with-a-musket-or-a-modern-day-rifle/answer/Alexander-Lindstrom?ch=15&oid=122566510&share=313ab059&target_type=answer https://www.quora.com/Would-it-be-worse-to-be-shot-with-a-mu...