Several years ago I saw an advertisment for touch hole liners that were nothing more than an allen set screw with a hole through it. I thought about it and realized they would not be difficult to make at home.

I used a 1/4X1/4 X 28 allen set screw. I made myself a jig to hold the screws and from the bottom of the screws drilled a 1/16 inch hole through to the wrench recess. Next I used an 82 degree countersink and brought the point all the way to the bottom of the hole, taking care not to enlarge the hole where the allen wrench bottoms out.

This seems to speed up the ignition process a great deal. My theory is that by countersinking the hole it gets the powder in the barrel a little closer to the flash in the pan. I also believe that the wrench recess actually funnels the flash to the hole.
The cost of each of these is about 50 cents and a few minutes of my time.

Has anyone else tried this?