Re: Load Density - what's too low?
You have to be VERY CAREFUL with low density loads in large cases...they don't always stick bullets...you can have hang fires and/or explosions.
It can also happen in smaller cases, the 243 Win is a good example...low density loads of slow powder have violently disassembled more than one 243.
"How low is too low?"
Well, that depends on a lot of things...case capacity, powder burn rate and bullet weight mostly...but the devil can also be in the details....like seating depth, neck tension, etc.
I'm not trying to scare you...just making the point, some rounds don't like low density...at all!
Do your homework...verify in a load manual...and don't take chances.