9mm is not a good tactical round?
Then why is the most popular submachine gun in the world the MP5, a 9mm weapon?
I am currently reading "The Finishing School" by Dick Couch.
This book is about what happens AFTER BUD/S. For this part, he is following class 2-02
He says, and I quote,
"The MK23 is a special 45 caliber pistol made to SOF specifications by Heckler & Koch. Both of these weapons(I skipped including the 357 revolver-GB)have their advantages, but are of limited use for SEALs.The secondary weapon in the teams, by issue if not by choice, is the Sig Sauer P226, a 9mm pistol".
Some people prefer the 45 and yes, it does have more stopping power than a 9mm, but the difference is something like 2%. In other words, in 2% of engagements, the 45, with one round, stops what the 9mm didn't with only one round. However, the 9mm can give 16 rounds vs the 7 rounds of a 45. 2% more stopping power, or 9 more rounds. Personally, I chose the extra 9 rounds.