This has been gone over many times by DeltaKilo on the 1911 forums.
Ammo Can - 1911Forum
Just search posts in that thread area for posts from DeltaKilo you will have hundreds of reading hours of actual real world ballistics information. From Lab tests to crime scene ballistics write ups on pretty much every caliber and every calibers grain weight variences along with FMJ/JHP ballistics performance in all the above. Have fun reading I know I did. He has alot of information and experience.