Shot count by bottle pressure 200 - 250 Bar .42 liter bottle

Indeed, rifle to rifle it is going to be different. In many cases vastly different.

That said, given only one rifle/tune, one could get the data and then use that to estimate for other tunes.

EG: I have seen this chart for LCS bottle options, but it assumes always a 300bar fill, so not what you are looking for;







A good article that goes into why this is so hard to nail down;

https://www.pyramydair.com/blog/2010/09/how-many-shots-per-fill-it-depends/