The 9mm which now is looked upon as a weak cal. ,is almost ballisticly the same as a .40 , the .40 is only 1mm larger than the 9mm , the claim to the man stopping power of the .40 cal ,is based only on this 1mm , there is no other scientific reason ,no matter how you debate the two calibers is will always come back to this
Some 9mm's are a bit weaker than the .40 depends on manufacturer; some .40's are a bit higher as well
now with that being understood
the .45 is 5 calibers larger than the .40 ,which would translate into around 2mm
ballisticly the .45 is a bit slower but ,the foot-pounds of energy is equal to the .40 ,but due to the twist of the rifle ,the 2mm larger caliber ,it will expand much larger than both the 9mm and the .40
Now in English
it puts a big freakin hole in whatever it hits
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