ring_main wrote:Believe it or not, there isn't a whole lot of difference in permanent wound channel when using a quality hollow point in 9mm, .40, or .45. An example of a quality hollowpoint would be Speer Gold Dot
Carry what you can shoot best and what is most reliable.
Wound channel is definitely one part of the formula and the differences in the hole made by a 9mm, .40 and .45 may not be THAT dramatically different. But an all important factor when it comes to paring down a defensive round is energy transfer .
Looking at the heaviest loadings of each caliber with Federal Hydra-Shok loads for example (147gr in the 9mm, 165gr in the .40 and 230gr in the .45) the difference between the 3 becomes very obvious...
45 vs 40: the .45 has 18% more energy at the muzzle and 20% more at 25 yards- a significant difference
40 vs 9: the .40 has 8% more energy at the muzzle and 6% more at 25 yards- a difference but not huge
45 vs 9: the .45 has 27% more energy at the muzzle and 28% more at 25 yards- not really a fair comparison
Looking at the other end of the spectrum with the lightest loadings (124gr in 9mm, 135gr in the .40 and 165gr in the .45) the numbers mix a little and the .40 really shines....
9mm: 345'# at the muzzle and 315'# at 25 yards
.40: 432'# at the muzzle and 373'# at 25 yards
.45: 412'# at the muzzle and 377'# at 25 yards
With lighter projectiles the .40 actually surpasses the .45 at the muzzle and is virtually equal at 25 yards while both dramatically outweigh the 9mm with approximately 20% more energy at both distances. Knowing these differences between the 3 rounds and having the option of either, it is obvious that the better performing round does in fact begin with a 4.
This does not even factor in another very important factor of a projectile...that being the tissue shock damage surrounding the entrance or wound channel. Basically a larger projectile does more terminal damage due to the larger frontal area and more energy transferring into the target.
One other note is that within the realm of the "4" calibers, the .40 is much more of a "snappy" round to shoot meaning the recoil is a quick, sharp jolt while the .45 is more of a heavy shove. Many compare them like comparing a .270 rifle with a 12ga shotgun. Personally I have both and like each for their own merits but my primary carry piece is a .45.
"Shoot low boys...they're riding shetland ponies in search of true grit" Lewis Grizzard