Peptide Critic Community

I’m probably doing it wrong but when I fill cartridges, I put the breather needle in the empty cartridge and then push the plunger up using another syringe until I can’t push it anymore. Then, without the breather needle, I add the peptide to the cartridge. The plunger allows the peptide to fill the cartridge and I have less air that I need to remove once it’s filled. Limits my risk of the plunger popping out the end.