FWIW,just so you know what you are likely dealing with,
Brass is resilient to a degree. It expands,then relaxes back some. That should make it easy to eject.
Under too high of pressure,the actual steel chamber in the cylinder stretches and expands. Of course,the brass does,too.
The steel stretched enough that when it comes back to size,it has an interference fit on the brass.
Kind of scary to think about stretching the cylinder that much.
I've fired some heavy H-110 loads in my SBH and never had difficult extraction.
No lecture intended,I'm glad it all held together.
I wonder what a good micrometer study over the cylinder diameter might reveal.
What was your load,if I may ask? Its also possible to misread the powder scale,or have a scale out of calibration.
Beware chain of custody on your powder.Contamination is possible.