Your posts reveal serious and, somewhat dangerous, misunderstanding. If you are thinking about loading your own ammunition, it is vital that you do some real work to find out about the physics of guns and projectiles before you actually load anything. There are lots of good sources, both books and on line, but you really need to educate yourself carefully so you can understand the relationships between powder charges and bullet weight, and a shooting forum is not a very good place to do the kind of research you need to do because whole volumes need to be understood. No one on a forum has the time to write those volumes for you, and there are many on forums that do not actually understand internal and external ballistics well enough to be sure you are getting facts and information rather than myths and legends. Please buy some (and I mean more than one) loading manuals, or go on line to read manufacturers (bullet or powder makers have lots of good information on line) load manuals to help you understand the physics you are trying to comprehend.