[mrerick]

Don, since I am not creating new loads (but rather following those in the published books) I have not bought the pressure transducer system. i just buy the books and follow them.

I also have a nice Chrony (the brand name of my chronograph).

Isn't the radar based one interesting?

Most people don't realize that under loading a cartridge is just as dangerous as overloading one. Both can produce excessive chamber pressure. The first because the powder burns and produces it's gas before the volume available behind the moving bullet is large enough to contain it. The latter, of course, because too much gas is produced before the bullet can exit.

Proper engagement with the rifling is a function of how forcefully the bullet is driven from the case (overcoming case mouth friction) and how sharply it bites into the leade and rifling (overcoming engagement bite and friction). If things are too slow, there is quite a buildup of pressure before the bullet travels very far.

it's interesting to see the multiple pressure pulses that they are measuring in some loads.

For teaching purposes, we have a small collection of "KaBoom" .45acp barrels at the club showing what happens when things go wrong on a bad day... None of them, thankfully, are mine...

Henrik, I'm glad that you have extensive experience doing this with black powder without consequences for so long. I thought it important to respond from my own experience - especially since an inexperienced shooter might read such a post and act without thinking.

I still would never do something like that, but wish you the best as you do...