"John" wrote in message
...
On Mon, 15 Mar 2010 22:31:43 -0400, "Ed Huntress"
wrote:


"F. George McDuffee" wrote in message
. ..
On Mon, 15 Mar 2010 19:59:59 -0400, "Ed Huntress"
wrote:
snip
I'd start with wirecut EDM, leaving about 0.005" on
each side, and finish with a shaper and lapping.
snip
How about making everything slightly undersize and the applying
Moglice or Turcite for the final fit-up. Should be a very slick
action and if the Moglice is only a few thousandths thick the
compression should be tolerable. Anyone know how Moglice/Turcite
is for impact loads? If it works on ultrahigh speed million
dollar machine tools, it should work on an small bore rifle
action.

I really doubt if they'd handle that kind of pressure, George. Their
compression strength for those loaded plastics really isn't very high. If
you figure 40,000 psi over the cartridge head, and then translate that to
the specific load imposed by the back of the block against the receiver,
it's still quite high. It probably would pound the block back over time.

We tend to think of big cartridges as being harder for an action to
handle,
but the fact is that small, high-intensity cartridges typically develop
more
pressure. Then the size of the cartridge base enters into it. But for
specific loads (psi), small, hot ones can be a problem.

.22 Hornet typically doesn't develop a lot of pressure. But a K-Hornet
can.


Didn't P.O. Ackley do some tests of forces applied to the breechblock?
I seem to remember having read something in one of his books. Seems to
me that they took a Winchester lever action, 92? 94? and tested it. If
I remember the final test was to remove the locking blocks and fire.
The bold staid close.

I have the feeling that the test might have been in support of his
"improved" wildcats with much straighter case walls but it was
interesting.

Of I have alzimers :-)

I don't remember Ackley's writings. It was too long ago for me. I do
remember the .218 Improved Bee and the .17 Ackley Hornet. They were two of
the crazy wildcats that I was nuts about when I was a kid.

--
Ed Huntress