Nessmuck- I no longer use antler powder measures, due to the variation they produce on each powder charge. I have found, that
a 3/8" tube measure makes for much more accurate powder throws, from my horns. I make them from ctg. cases, usually, turning off the
belts and turning down the rim-ends. A screw-eye soldered into the flash hole makes for an attachment point for a thong or string. The
synthetic sinew that track sells makes good strong '[thong' that actually looks great. A cross-pinned plug of wood also makes a good end-stopper.
Brass tubes from the hobby store also make good powder measures. The far left measure and the two on the far right, top row, are brass tubing measures.