Me being the cheap S.O.B. that I am, (I take after my Dad) I came up with some cheap and easy to use drop tubes.
The first one is for the 45-70. I took a hunk of left over 1/2 " potable tubing, (It's a grey pluming tubing) about 36" and black taped it to a hunk of wood molding. It's like an angle iron, but wood, and taped a plastic funnel to the top of that.
The case fits inside snug, so all I have to do is insert the case, drop the powder, and while I'm still sitting on my stool, pull the case out. I can lean the drop tube against my loading bench whilst I'm measuring the next charge.
The one for the 38-55 is made the same way, except I used some clear tubing that was left over from a wine making project. I would liken it to aquarium tubing. Again the case fits snuggley into the tubing, permitting moving the tube while it holds the case in place. So I'm able to measure, drop, and place the case into the loading block with out getting off my butt.
The cost was zero, but all the parts can be gotten at any hardware store for next to nothing compared to those fancy brass babies with a holder. I'll bet a yard stick would work for the thing to tape the tube to.
Since the static electricity theory has been de-bunked, but, (The new plastic might be a bit staticy at first) if you have problems with static, wipe your equipment with one of those "Cling Free" type laundry sheets, problem gone. And if you use one of the scented ones, well things smell pretty for a while
Hope this help a bit.
Knarley