Does loading density of 90% mean 90% of empty case?

[Juster]

Or does it take bullet seating into consideration?
I have conflicting information, thanks in advance.

(There is a Powley calculator spreadsheet that takes seating into consideration, and an online calculator that does not. I can alter the spreadsheet to get the exactly same result as the online version. I think seating should be included, but I was wrong once. Years ago).

Edit: OK, I'm convinced that bullet seating volume is subtracted from empty case volume, thanks to all!

 

[burnt_servo]

i always thought it was a percentage of the case volume AFTER the bullet was seated .

the case volume changes depending on the oal length as the bullet displaces more or less volume from a empty case .

 

[unstableryan]

it should be % full after seating a certain bullet to a certain OAL.

 

[H4831]

Some powders seem to work better, if they are compressed.
4350 and 4831 are a couple of examples.