You might also want to read: http://www.gundigest.com/gunsmithing...rch_ruger10-22
Thanks everyone for the replies. I guess I'll just run a bunch of
rounds through the new barrel liner and see how well the rifle shoots.
BTW, in my post I mentioned the age of the rifle in an effort to be
thorough, not because the thing has any kind of value. I bought the
rifle years ago just because it was interesting and because of the
small size which makes it a perfect rifle for a child to learn on.
Even though it was originally chambered for 22 long rifle and is so
again I will mostly be shooting CB shorts or longs. I like those
rounds because of how quiet they are. The action is described as a
rolling block type but I have read that it is not actually a rolling
block but sort of a falling block. I'm no type of an expert when it
comes to firearms so that's part of the reason why I am concerned
about the large chamber diameter. Right now the breech block does not
contact the breech face in a parallel fashion because the breech face
was so damaged I had to remove .010" in order to clean it up. I will
need to move the barrel back .010" so that it will once again contact
the breech block properly. Either that or move the breech block .010"
forward. Because the barrel is held to the action by only one thumb
screw I can see three ways to fix the problem.
1) Machine .010" from the barrel lug so it will slide forward. But
then I will need to either add metal to the other side of the lug and
machine it flat or shim it. If this is not done the barrel will slide
back away from the breech block.
2) The reciever is a slab sided affair that is pinned together so I
could press the pins out that hold it together and machine it similar
to how the barrel lug would be machined and then build up with weld
and machine back to size or shim in order to make sure the barrel
cannot move from the new position.
3) Remove the rolling block which is retained by only one pin which it
pivots around. Bore the hole in the rolling block oversize and move
the location .010" in the proper direction at the same time. Then
press in a bushing to bring the hole back to the proper diameter. I
will probably use aluminum nickel bronze for the bushing because it
would be perfect for this application.
I don't think the breech block will provide much of a gas seal even if
it contacts the breech face perfectly parallel. I think any movement
of the shell case out of the barrel would tend to push the breech
block away from the barrel at least a few thousandths of an inch and
this would allow any gas that escapes past the shell O.D. to vent at
the breech face. And this could maybe cause a burn if a child had a
finger close to the breech. This is why I am concerned about the large
chamber.
Any thoughts?
Thanks,
Eric
Why not simply silversolder a .010 shim on the face of the breech? If
it needs some trimming..it can simply be done on a bit of 150grit
placed on a solid flat surface? Dont overthink this. Least of all
with the very low pressure CB caps (and Id have chambered it for CB
caps if thats all I was going to shoot in the old girl. Or at the
most...22 shorts