"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.

--
Ed Huntress


FYI
http://www.moglice.com/
http://www.neme-s.org/nemes%20gazette_files/G054.PDF
http://www.practicalmachinist.com/vb...endors-148557/
http://www.professionalplastics.com/...istantPlastics

some hits for moglice OR turcite "firearms
http://www.yellowbullet.com/forum/ar.../t-136620.html

Anyone seen a teflon coated rifle bolt?



Unka George (George McDuffee)
..............................
The past is a foreign country;
they do things differently there.
L. P. Hartley (1895-1972), British author.
The Go-Between, Prologue (1953).