GUNS Magazine January 1960 - Jeffersonian

% SAVINGS
...--. FINANCIALLY
INSURED
(Continued from page 40)
moisture. Waterproof plastic bags are good.
Removable scope sights are advised, since
moisture condenses on the lens, making
shooting difficult. Open and peep sights
generally work best in the jungle. Bring a
generous supply of gun oil and slick the
weapons down after each day's hunting.
Probably the ideal Mexican safari arsenal
would be a big·game rifle, a 12·gauge shot·
gun, and a .22 rimfire rifle. The rifle would
be for general hunting, the shotgun for
miscellaneous work and wing shooting, and
the .22 for shooting iguana lizards and
perched pheasants. The fourth weapon, if
you wanted to carry one, might be a spare
shotgun. It isn't necessary, however.
"If I were limited to one single weapon,"
added Purvis, "I most certainly would choose
the shotgun. It will handle everything found
in this part of Mexico."
The hunter planning on trying for jaguar
in Mexico shouldn't plan on anything extra.
When you hunt jaguar, you hunt nothing
else. It is a long and drawn-out affair, often
filled with disappointment. Purvis recommends
that the hunter allot a certain portion
of his time to hunting jaguars. If by that
deadline he hasn't connected, he should
forget the elusive cat and concentrate on
other jungle game.
The amount of game you are permitted to
bring back into the United States depends
on the particular state laws where you reside,
plus existing federal laws. You can bring
home the amount of game allowed under
your state statutes.
Despite belief to the contrary, a hunt in
Mexico is not a shoestring affair. Purvis
says the least a foreign hunter could scrape
by on would be ten to twenty dollars a day.
In many instances, the expense will be
higher.
Although little is known about Mexican
hunting and arrangements for a successful
hunt are hard to come by, still it remains
that this is one of the few remaining areas
left in orth America where hunting has not
been commercially exploited. The man who
tackles the difficult task of arranging a
Mexican jungle safari himself will find
countless obstacles in his path. At times he
will wonder if it is worth it. But after the
hunt he no longer will wonder. He will
know that it has been one of the highlights
of his hunting career-strange and different
hunting in a strange and different ~
kind of country. ~
ATTENTION
Gunsmiths, Collectors
Blueprints of Chambers
Rifle-Shotgun-Pistol-Revolver
Most popular calibers
$1 per caliber
$2 per three calibers
$5 per ten calibers
C. C. HAGELSTEIN
P.O. Box 297
Inglewood, California
THE .257 CONDOR
inital velocity. After a number of experiments
with a .30 caliber, the decision was
made to go to a .25 caliber with a 160 grain
bullet.
Calculation indicated a rifling pitch of 6lh
inches would stabilize the bullet, but testing
determined that better accuracy and velocity
were achieved with a 7 inch pitch. Very
short cases developed more pressure than a
longer one of the same capacity. Efficiency
increased as shoulder angles approached 30
degrees; but with the angle sharpened excessively
it was found that combustion was
increasingly more difficult to control, with
(Continued from page 19)
4.2
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Condor bore after 1025 shots is eroded at case throat; heat-checked for 2".
the powder charge being very critical, developing
sudden presure peaks. Hence, the
shoulder angle was cut back and given a
semi-venturi shape. The belted Magnum case
was cut to .30-'06 length so it would function
in a standard action, and was shaped to hold
64 grains of average IMR powder to the
shoulder.
Once off the beaten track, the experimen·
ter encounters many difficulties. With the required
rapid-pitch rifling, at an effective
velocity, the bullets disintegrated in the air.
In the long bearing surface bullets, cores
were melting through excessive bore friction.
Centrifugal force from spin then exploded
them. Tested was a two-diameter bullet, with
little improvement; then solid copper bullets.
Made to original dimensions, they weighted
only 145 grains. Disintegration stopped, but
the light bullet lost velocity so rapidly that
it was nose-diving beyond 300 yards.
With no practical way of reducing bore
friction or centrifugal force, it seemed to me
that the only way out lay in reducing the
heat transfer which was melting .bullet cores.
Copper jackets transmit heat rapidly, so I
suggested the use of steel jackets. Atkinson
& Marquart in Prescott, Arizona, made
swaging dies and a supply of steel jacketed
bullets using Shelby tubing. These bullets
proved the theory, stopping disintegration,
maintaining good trajectory, and giving sensational
results on game. But best Shelby
tubing available proved to be far from uniform
in hardness, so accuracy suffered, and
the bare steel bullets were a bit rough on
bores. One barrel washed out completely
with 207 rounds.
We tried to get a bullet maker to furnish
bullets jacketed with Trio-Metal, like the
Government .30 M-2 Alternate bullet or the
Norma match bullet. These steel jackets
have a layer of Gilding Metal on either side,
the inner layer protecting the drawing
punches while the outer protects the bore.
No bullet makers in this country were found
willing to tackle the problem.
Amund Enger, President of Norma-Projektilfabrik
in Sweden then accepted the
project. An order was placed with the Swedish
firm thm E. H. Sheldon of Norma-Precision
in South Lansing, New York, for
100,000 bullets, 12,000 cases, and 500 boxes
of loaded cartridges. Test barrels and the
GUNS
JANUARY 1960