Sorry, I did misunderstand.
Choking aside, If you have 20% contamination of larger shot (determined via sieve testing) you're likely out of spec.
The discontinued AMS-S-13165 uses a single sieve for in-use media and would not disqualify the sample, however, it is a discontinued spec and you should follow AMS-2430.
AMS-2430 allows only 1/2% of the test sample on a #25 sieve, where you'll be clearly out of spec.
If the media does flow freely through the nozzle you still may achieve acceptable confirmation arc heights. You should generate new saturation curves. The larger media will increase the intensity but will take longer to saturate, thus resulting in a "double hump" saturation curve. If you chose to pursue this as a learning experience make sure to have extra Almen strip data points at longer than normal exposure times.
Have fun!
