Case weight variation powder capacity and significants on the target

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Originally Posted by TeRei

Firstly throw those S&B cases as far away as you can. They are junk.*You would get better returns with annealing and improving neck geometry and tension for the best release. 2C.

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Yes, think I will do that. They really are waaayyy heavier.

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Originally Posted by Oldbloke

Yes, I could have used AS50N which is a fairly fine shotgun powder. But, honestly, I use AS2208 in the 223 I want to know how much AS2208 they hold, not water.

If I had a container used to store biscuits and I wanted to know it's capacity, would I use water. Nope that would be useless, because of the shape and size of the biscuits. Because I need to know how many biscuits it holds. I understand it's different but, really!

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True but depending on how your biscuits pack into the tin there could be between 26 and 50 percent empty space between them. Same with firewood if you have to buy it heaven forbid it's sold as a thrown meter pack it properly and you're lucky to get over half that. Same with powder. If you were to repeat your results several times for each case I suspect you will get a range of results that measure usable capacity, but the only true measure of the cases capacity is to use liquid.

Video from MDT. Maybe a bit simplistic and not a large enough sample size to satisfy some on here but gives food for thought on another ammo aspect that some individuals may get too hung up about. Brings back memories of clipping ends off .303 fmj ammo back in the day, worked well enough at short/medium range. Something to think about. Have at it.
https://youtu.be/svzsT3SYFXM?si=b1Y0eCoUUM5gbv2d

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Originally Posted by Oldbloke

Yes, think I will do that. They really are waaayyy heavier.

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Yep, done. Only 40.