I still don't believe that a bullet jammed into the barrel, with a normal charge set off behind it, will actually cause a pressure spike beyond normal chamber pressure, 99% of the time. Especially with handguns, which is the context in which "detonation" is typically raised.
It's basically identical to what would occur if you used a larger volume case (say a .308 Win charge in a .30-06 case, or a 9mm charge in a .357 case), and seated the bullet so that it was jammed tight against the rifling, or with an ultra-tight roll crimp (which will increase pressures due to increased friction, but nothing magical). So that would only be an issue if the powder charge is such that an extra-tight crimp, or seating too long, would increase pressure dangerously; not a safe load to begin with. Isn't some rifle ammunition supposed to be seated so that the bullet is a hair away from engaging the rifling, anyway?
If you've got a bullet acting as a "bore obstruction," and are firing a normal powder charge behind it, there will be absolutely nothing special happening. You just have the equivalent of a larger case, and an extra-tight crimp. That's it.
I'm going to try it out tomorrow, if I have time. TIG welded Glock 23, 180 gr Berry's Preferred Plated hollowpoint, 6.9 grains Power Pistol, CCI small pistol primers, Speer brass. One bullet lodged in the middle, one lodged in the throat, one normal round, and then one with a 10% overcharge. Cases used for lodged bullets will have the powder held in by a cardboard wad. I don't have any fancy pressure testing equipment, so I'll have to go by what the fired case looks like, particularly the primer. Will have to figure out some way of catching the brass.
edit: And now a before pic. O is overload, N is normal charge, X will be bullet in the middle of the barrel, and T will be bullet jammed in the throat.
It's basically identical to what would occur if you used a larger volume case (say a .308 Win charge in a .30-06 case, or a 9mm charge in a .357 case), and seated the bullet so that it was jammed tight against the rifling, or with an ultra-tight roll crimp (which will increase pressures due to increased friction, but nothing magical). So that would only be an issue if the powder charge is such that an extra-tight crimp, or seating too long, would increase pressure dangerously; not a safe load to begin with. Isn't some rifle ammunition supposed to be seated so that the bullet is a hair away from engaging the rifling, anyway?
If you've got a bullet acting as a "bore obstruction," and are firing a normal powder charge behind it, there will be absolutely nothing special happening. You just have the equivalent of a larger case, and an extra-tight crimp. That's it.
I'm going to try it out tomorrow, if I have time. TIG welded Glock 23, 180 gr Berry's Preferred Plated hollowpoint, 6.9 grains Power Pistol, CCI small pistol primers, Speer brass. One bullet lodged in the middle, one lodged in the throat, one normal round, and then one with a 10% overcharge. Cases used for lodged bullets will have the powder held in by a cardboard wad. I don't have any fancy pressure testing equipment, so I'll have to go by what the fired case looks like, particularly the primer. Will have to figure out some way of catching the brass.
edit: And now a before pic. O is overload, N is normal charge, X will be bullet in the middle of the barrel, and T will be bullet jammed in the throat.
Attachments
Last edited: