It's the massive difference in the amount of powder.
No, it's important to recognize that the technical differences between .22LR and .223 are meaningless when it comes to the ATF and their ridiculous categorizations have nothing to do with technological facts or effectiveness, and everything to do with feels and optics
Agreed, I was saying the difference in performance s the amount powder. That is the difference in ability. More powder = more speed for a heavier bullet = Higher number on the 'relative index of stopping power'. I forget the exact formula but it's velocity, weight and diameter and it puts it on a scale of 0-as big as you can go. Like a 9mm with typical weight lands around a 48. A .45 with a 230 grain is like a 98, so big difference. A Desert Eagle .50AE with a 300 grain is 600+ so it goes up fast. I know there are a few, just can't remember which exact one.
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