"If you want to use .38 +p as a norm (100%) you should also compare it to 9mm +p to make it fair. But even so .38 +p is closer to .380 than to 9mm; (regular) 9mm is almost 38% more powerful than 38+p. While .380 is only 31%less powerful than .38+p. Although this is better comparison; 9mm has 55% more power than regular .38 load."
Agreed, you can see it so. Somehow I know you'd come up with those winchester figures
The best load in 9mm is 115gr, I chose the best 147gr load for comparison as i don't want to shoot anything else to 158gr in .38
I never intended to say .38 +P rivals 9mm +P in factory loads. There's no way a .38 out of a revolver surpasses 9mm and if it does in some loads (like Corbon +P vs. normal 9mm or something) it won't offer any advantage because it will have more bang and more recoil than the 9mm because revolvers aren't energy efficient.
Nonetheless, The figures show that .38 +P plays in the same league as normal 9mm. Corbon +P out of 4" barrels is 420 ft-lbs vs. 451 in 9mm. Buffalo Bore +P is 420ft-lbs for .38 special, too, while Buffalo Bore 9mm +P is 431ft-lbs and 500 in +P+
Perhaps one can say the following things:
1. .38 special in 2" snub nosed revolvers is like .380
2. "factory load" .38 special +P is in the right in the middle between .380 and 9mm +P and rivals (i.e. less than 20% difference) slow non +P loads in 9mm
3. hot .38 special +P like Buffalo Bore / Corbon are in the same league as 9mm +P
4. the hotter the loads the less leads the 9x19 in the energy department, for instance .38 special vs. 9mm 55-60% while Corbon/Buffalo Bore .38 +P vs. 9mm +P+ is 20%.
5. Although right on par with 9mm +P, 38 +P should be compared to 9mm +P+ as both are the hottest possible loads and I can't imagine any 9mm weapon that isn't capable of shooting +P+ while .38 +P is right on the edge for many revolvers.
Where has this discussion lead us? I think not very far. Still the 9mm has 20% more energy and still that is meaningless and won't make any difference. Why? 20% more is an advantage. But energy isn't everything. Higher bullet weight has advantages, too. The most important factor is: do you think the +20% advantage of 9mm is more or less important than capacity? I'd definitely say less important. So why bother with energy figures? Either you're a revolver or semi auto guy.
At least in our free market capitalist society we can choose whatever is right for each of us. Perhaps that's the most important.