Hi. Time for a dumb question. I can't seem to find an answer, and there may NOT be one! ha ha

I have tried using water to measure the relative case capacity of some new ctgs. before and after fire forming.

Question: Is there something I can do to reduce the surface tension of the water? I 'think' that there are air bubbles in the primer pocket or in the shoulder of the AI bases. I noticed a large delta in case weight that was inconsistent even using the same case.

Distilled, de-ionized water??????

What's the correct method?

thank you!

ron