Take the barrel off the frame.
Remove the extractor by tapping out the 1/16th roll pin that holds it in.
Drop one of your sized
The case head should be flush with the end of the barrel. If it isn't, you need
to adjust your size die down in small increments until the case head is flush
with the end of the barrel or protrudes no more than about .002." If the case
head falls below the end of the barrel, you have pushed the shoulder back too
far and created headspace. You can rely on "feel" as you run your finger across
the end of the barrel and case head, or hold the end of the barrel up to eye
level and sight across the end of the barrel to determine that the case head is
not sticking out of the end of the barrel. .002" is difficult to see... it is
Now load this case with a full normal load, and shoot it.
When you open the barrel without the extractor installed, the case head will be
in the position it was when fired.
Take the barrel off the frame and look at the case head again. It will usually
be sticking out of the end of the barrel about .010" or more.
This excess length must be removed. Ie., you have to bump the shoulder back
in a full length size die. Neck sizing is out. If you insist on neck sizing
or just partially full length sizing and have misfire problems, this is the
Typical barrel to frame gap is normally from 0 to about .004." Some will be up
to about .006" or so. To be more precise, close the barrel on feeler gauges to
determine exactly what the gap is.
Your sized cases should not protrude from the end of the barrel more than the
amount of the barrel-to-frame gap.
Failure to understand the above is one of the two main causes for misfires and
accounts for a big percentage of the questions I get.
So at the first hint of misfires, CHECK YOUR SIZE DIE ADJUSTMENT.
in length when fired in these break open guns. DO NOT TRY TO CRAM THEM BACK IN
BY SLAMMING THE BARREL SHUT. It is like trying to drive a square peg into a
round hole. Just don't work.