I purchased one gram of nuggets awhile back. Seven pieces/gram, time constant varied between 1 and 2 us. Thinking .03g nugget has a time constant less than 1us. I liked #9 shot since size and time constant (about .7us) should be similar to nuggets less than .1g until I found they weren't consistent. A 10mm square piece of aluminum foil has a time constant of .7us but is easily detected because of size. Standard target needs a time constant between .5us and 1us and a size that gives a detection d