where it would just slip into the chamber of the shotgun. I carefully trimmed a little at a time off the front of
the rim until I could just close the barrel up with a 30-carbine case chambered in the chamber.
You can also make a chamber liner for a 38 or 357 cal. This is a chamber insert made like the long
insert; with the exception it is only 6" long. Use a "0" on the front to center it.
On a high-pressure cartridge the firing pin hole in the breech block needs to be bushed, to keep the
primer from flowing back and locking the action closed. Also any time that the primer flows back, there
is always the chance that the primer will rupture. If that should happen, high-pressure gas may wreck the
stock and action. There is always the chance of personal injury from the high-pressure gas. If you are
using a cartridge with pressure over that of the 45-70 or 38 Special, and always BUSH THE BREECH
BLOCK.
The best cartridges for shotgun inserts are rimmed cases. The lower pressure cartridges will give good
accuracy up to 100 yards with plenty of power for most game.
The liner inserts give fairly good accuracy up to 100 yards, and have had many 5-inch groups from a 0/U
shotgun. Some type of sights needs to be installed to get this type of accuracy. For close shooting good
groups can be achieved with the front bead.
If you use the shotgun regularly, you can install an adjustable rear sight.