45 is more powerfull. larger bullet, more powder = s more knock down power.I own both calibers. It's obvious just by shooting each gun.
my opinion is the 45 ACP round has more knock down powder then the 40 caliber
Depends on the load.
I don't believe so.......................
No
Given proper shot placement, none.
85-40 = 45 and 45+45 = 90
A 44 magnum is more powerful than a 45calibur
maybe 80 feet at 45 degrees
If you are referring to the present, today's most powerful sub-machine gun is the H&K UMP .45 cal sub-machine gun, or the Kriss Vector SMG. if you are referring to the past however then its undeniably the Tommy Gun. also a .45 cal sub-machine gun.
.40 is the more powerful ---------- I would have to beg to differ on that one. The highest energy .40 S&W round produces 500 ft/lb... that's the 155 grain Guardian Gold @ 1205 fps. The 200 grain Speer Gold Dot in .45 ACP produces 518 ft/lbs, while the 185 grain bonded defense produces 616 ft/lbs. So sure, there are some .40 loads which produce more energy than some .45 ACP loads, but overall? No.
.17....22 Cal....32 Cal....38 Cal....9mm....40 s&w....357 m......44 special....44magnum...45 Cal....454 Cal.....500 magnum......50cal
200-2000 or more