The ideal wasn't getting people to use Hunting Rifle, I think it was quite the opposite: .308 is a smaller caliber thus it should be crap compare to .44 and .45 according to JE's rule of thumb in NV.
If Josh thought this, and I'm sure he didn't, then he would be wrong. The .308 rifle round, while a smaller diameter bullet, is a more powerful round than either .44 or .45, both of which are pistol rounds (unless you're talking about .45-70, which is a rifle round, but a very old one introduced in 1873 back in the less powerful black powder days). Just to give you a reference point here are a few numbers:
Energy - Defined as mass x velocity
2. How much kinetic energy the bullet has available to pentrate the target to vital organs and impart that energy to damage tissue. Measured in foot-pounds, here are the comparable numbers for common cartridge loads for each round at the muzzle:
.308, 180 grain FMJ - 2331 ft-lb
.44 Magnum, 240 grain JSP - 741 ft-lb
.45ACP, 230 grain FMJ - 371 ft-lb
This difference gets even greater at range, as pistol rounds are relatively low velocity, large cross section rounds that bleed energy much faster than high velocity, energy efficient rifle rounds. Here are the energy numbers at 200 yards, a pretty short rifle shot, but an incredibly long pistol shot (same bullets):
.308 - 1735 ft-lbs
.44 Magnum - 440 ft-lbs
.45ACP - 243 ft-lbs
Now, to keep this honest, there are many schools of thought on how to determine which measurement is "correct" for determining how much killing power a bullet has. One method, developed by a big game hunter named John Taylor, takes into account the diameter of the bullet and comes up with a number for "stopping power". Here are the same bullets using Taylor Knock Out (TKO) index at the muzzle and at 200 yards:
.308 - muzzle, 19.1, 200yds, 16.5
.44Mag - muzzle, 17.5, 200yds, 13.5
.45ACP - muzzle, 12.7, 200yds, 10.2
As you can see, in any instance, the high powered rifle round has both greater energy (mostly from it's higher velocity and greater ballistic coefficient) and greater stopping power (in spite of it's smaller diameter), and holds this advantage out to a much longer range. Terminal ballistics pentration charts will show the .308 has much greater pentration also. (Full disclosure disclaimer: The numbers I used for the pistol rounds were from pistol length barrels. If you fire the .44 from a longer, ie: carbine length barrel, you wil have higher initial energy, but then the great drop off in performance at range, but it still does not beat the .308.)
Any way you slice it, the .308 is a more lethal, longer ranged, more accurate round. Of which I am 100% certain Josh (the E ain't for Energy Weapons) Sawyer is fully aware of.
-Gunny out.