Just sharing a tip on comparison of fouling.
(1) Use same cleaning formula on all test patches
(2) Use same patches/material
- Weigh each patch before cleaning
- Wipe bore (don't lose crud that falls off)
- Save patches.
back at the shop,
- Allow all patches to air dry....sunlight or warming lightbulb to assist
- weigh each patch
- Subtract patch weight and you now have a numerical value for fouling.
Anyway, that's roughly how I've instructed our test centers to evaluate fouling.
In the case of metal parts that are fouled, I have them weigh before & after cleaning in a solvent tank.
I use similar techniques for evaluating primer material, percussion caps and combustible cartridges.
An accurate scale is handy for much more than weighing powder & bullets.
Slim