"Slinging Tungsten and Tin." Has to Be Talked in the Future
Here is the news from US Department of Defense
By Jim Garamone
American Forces Press Service
WASHINGTON, March 4, 1999 – Some range NCOs talk about "slinging
lead down range." In the future they'll have to talk about "slinging
tungsten and tin."
That's because the Army is producing
environmentally friendly ammunition. The first million rounds will be
produced at Lake City (Mo.) Army Ammunition Plant, and officials expect
troops from all services to be using the new "green" rounds soon after.
Researchers at the Army's Armament Research, Development and
Engineering Center at Picatinny Arsenal, N.J., developed the 5.56 mm
bullets, which have a tungsten-tin core sheathed in copper. Current
rounds use lead cores.
Don't let "environmentally friendly" fool
you: The new rounds proved slightly more accurate than the lead versions
during testing, officials said. The new rounds are ballistically and
visibly identical to the old and require no special handling.
Alaskan
National Guardsmen recently finished qualifying using the new rounds.
"There was no difference in the performance of the rounds concerning
shot groups or functioning of the weapon," said Army Maj. Gary Curtiss,
operations officer with the 1st Battalion (Scouts), 297th Infantry.
"We've
been working on this for about two years," said Jim Arnold, chief of
the pollution prevention and environmental technology division at
Aberdeen Proving Ground, Md. "The concept is part of an Army initiative
called Range 21. It is about the Army being good stewards of training
and testing lands."
The idea is to reduce lead in the environment.
The heavy metal and its chemical compounds are poisonous. Even small
doses can cause irreversible brain damage if ingested or breathed.
Contrary
to news reports, lead contamination is not currently a problem at
military outdoor ranges, although it could conceivably leach into
surface water on some of the more heavily used ranges, he said.
"There's
no problem now, but there could be," Arnold said. "Why not look ahead,
anticipate problems and solve them before they start?"
Arnold said
the concern is indoor ranges, such as those used regularly by the
reserve components. He said many indoor ranges have been closed. While
lead contamination is part of the total picture, general health concerns
about the vapors, residues and other pollutants created by firing
rounds plays a larger role in closing the indoor ranges. Still lead is
toxic and if we can get rid of even the small chance of breathing lead,
we should, Arnold said.
The tungsten-tin solution is not
expensive. Arnold said the costs of new and old rounds are comparable.
Once in mass production, tungsten-tin bullets may be cheaper than lead
ones, he predicted. The Army buys all the small arms ammunition for the
military -- 200 million 5.56mm lead- copper rounds in fiscal 1998.
If
the green 5.56mm round proves successful in actual field use,
researchers will move to 7.62 mm, 9 mm and .50-caliber rounds. "The next
is the '50-cal,'" Arnold said. "There's a small amount of lead in the
round we think we can get rid of through improving the industrial
process in making it.
"The 9 mm is the tough nut to crack, because
the bullet is fairly large," Arnold continued. "There has to be some
cost reduction on tungsten-tin before this will work."
"Green"
bullets solve only the problem of reducing lead in the environment.
Scientists also are working to make bullet propellants and primers
"greener."
"All my young engineers have been excited about working on this project," Arnold said. "There isn't really a down side to it."