So why doesn't everyone just carry a 10mm and go on with it?
I do!But seriously I feel just as prepared with my 9mm, .40S&W or .45acp as my 10mm for personal protection against others. The 10mm really doesn't matter to me until I go hiking out west and then you could just argue that a 41, 44mag etc is better.
There is nothing wrong with the 124 grain +P gold dot load. It is one of the best on the market and highly successful in law enforcement. Let me put it this way. I rather carry my S&W 9mm with the 124 grain +P Gold dot load then my Springfield .45acp with some Winchester white box jhp. I think the quality of the bullet makes a bigger difference then going from .35.5 to .45.2 caliber bullet.
Just my two cents