I am flabberggasted! These threads are full of writers who wouldn't load a case if it was .003" shorter than their book said, because it might "blow up in their face."
Others wouldn't use a magnum primer, if their book said standard primer, because, "I don't want my rifle to blow up in my face!"
They wouldn't load two grains more 4831 powder in their big, bottle neck case, than what the book says is "maxium." You get the point.
Then in this thread we see one of the most dangerous things a handloader could do, being talked about!!!!!
It is extremely dangerous to further seat a primer, once the cartridge is loaded. It would be very unlikely the primer would go off, but if it did, the loaded cartrdge in the steel die, held tight top and bottom, would be a virtual hand grenade. I can't see anyone within feet of that surviving.
It's something like having a sleep on a country rail road track. Unlikely a train would come, but if it did, you would be hamburger.
Throughout all my loading carreer I have stressed a few thing that are extremely dangerous.
1) Accidently loading a fast powder, when you intended to load a slow one.
2) Getting a double charge of fast powder while loading light loads, where the case is less than half full.
3) Don't ever touch your loading equipment to a primer on a loaded cartridge.
That is, never try to seat the primer deeper, on a loaded cartridge.