I was wondering why it that most standard 9mm and .40 ammo is supersonic but standard .45 ammo is subsonic... I just can't wrap my head around the concept. Anyone know the reason why?
I understand the physics. But I don't understand the whole '185 gr. bullet'... is that indicative of the bullet mass? How do you determine the approximate powder load for different ammo?Think of it like this...
Bullet velocity OVER the speed of sound is roughly 1100 feet per second (750 mph) making it SUPER sonic.
.45 ACP travels at about 850-900 feet per second.
Now, if you take all three rounds into equal material, you will see that speed does not always equate to overall damage...
Hence the reason the .45ACP was handed down from John Browning himself as THE bullet of choice. Subsonic AND packs a hell of a whallop.
indeed but im pretty sure your chances of surviving the CBR collisision are significantly higher than the mack truck even if they are both pretty slim.If you are walking down the road at the time, it's a moot point. You would be dead either way.