The other issue that I have that is really more important is that a standard nipple and hammer are designed to vent gases and particles of cap away from the shooters face.
True and keep in mind that the hammer cup, is directing the fire down into the snail. All the time, the outside spark is cooling. I get more cap fragments, from a standard nipple and it does burn, doesn't it?
As far as ignition I have not had a problem. Have you ever observed the spent primer stacking, inside the hammer cup? I never had that happen while using a HotShot nipple. .....
Be Safe !!!