On Sat, 07 Sep 2013 11:11:49 -0700, pyotr filipivich
wrote:
John B. on Sat, 07 Sep 2013 18:39:42 +0700 typed
in rec.crafts.metalworking the following:
On Fri, 06 Sep 2013 19:01:27 -0700, pyotr filipivich
wrote:
John B. on Sat, 07 Sep 2013 08:09:57 +0700 typed
in rec.crafts.metalworking the following:
On Fri, 06 Sep 2013 09:43:40 -0700, pyotr filipivich
wrote:
John B. on Fri, 06 Sep 2013 19:03:50 +0700 typed
in rec.crafts.metalworking the following:
So, my questions:
1) Does anyone have the specs for the bullets themselves? Or a
link to where those same specs can be found?
Bullet diameter is 0.251".
Length?
--
pyotr filipivich
"With Age comes Wisdom. Although more often, Age travels alone."
I'm not exactly sure what you are asking. I believe that all the
Browning cartridges head space on the case mouth, at least the ones I
had anything to do with did (although on second thought some of them
are semi-rimed I think). I think that you are talking about the
dimensions of the part of the bullet that sticks out of the case,
which, other then overall length, isn't much of consideration, at
least for a .25 Browning.
Right now, I have a bullet 7.49 mm long (from base to point) which
merely sits on the cartridge - because I have an additional 0mm for
the cartridge/brass to grasp.
Sort of. SAAMI specifies a maximum overall length of 0.910" and a
minimum length of 0.860. the case length is specified as 0.615 -
0.020. Subtract one from the other tells you how much pullet
protrusion you can have in a "standard cartridge".
But, I'm a bit vague about why you are worrying about "bullet"
dimensions/
Because I want it Right! And it gives me a great excuse for why
I'm not getting anything else done between terms.
Yes, sort of. The specification for the .25 ACP shows a bullet
diameter of 0.251 -.0060. the forcing cone starts at a diameter of
0.2562, is 0.0259 long and ends at bore diameter which is 0.243.
However, that specification is for a integral chamber but I suspect
that a revolver would use a similar dimension.
From my reading, forcing cones on revolvers tend to be larger,
because of the issue of indexing. That is, loose tolerances or worn
mechanism may result in a chamber not lining up with the barrel, Sot
he manufacturer just makes a big funnel at the on end of the barrel to
catch the bullet in, and guide it to the center of the barrel.
I can't speak for all revolvers but a mate used S&W's for both
centerfire and .45 guns and the cylinder certainly indexed better then
that and the forcing cone on both guns was not that big.
I don't know how "big" is big. Probably a diameter just few
thousands of an inch larger than the bullet or case. All depends,
yada, yada yada.
But I did know a bloke that shot a revolver in both the .22 and the
centerfire matches and he had the cylinders marked on both guns and
fired all his slow fire using one chamber.
What ever works.
I'm just now really coming to grok that the bullet is "tossed"
from the cylinder to the barrel and then propellant gases are leaking
out the gap. "Ve vill haft to do zomsink about dis!" (For
Sicience!)
If you are worried about gas leakage between the cylinder and the
barrel look at the Nagant M1895 Revolver that moved the cylinder
forward to seal against the rear of the barrel.
http://www.youtube.com/channel/HC8cJCbYh2txs
Apparently the only revolver to have this function, for some reason
:-)
--
Cheers,
John B.