From: "Peter Sarony", [EMAIL PROTECTED]
I have to agree with Jonathan Spencer, for the evidence
is unmissable. Those who may have used effective
compensators, such as the multiple baffle and
expansion chamber system my company developed for use
originally with handguns, the baffles and expansion
chambers become caked heavily with lead after use. Lead
attracts more lead it seems and the free area inside the
expnasion chambers rapidly filled up with solid lead. The
build up was far less with jacketed bullets, which it has
always been taken can be pushed a lot faster than can a
lead bullet.
Incidentally a soft swaged lead bullet is fine where
obduration is required to seal it to the bore in a soft
target (i.e. hollow based wadcutter) load, but at a
medium velocity the skirts break off and are ledt as a
ring of lead in the bore. You may still see a hole
registered in the target by the forward portion of the
projectile, but if you fire another round into the
obstructed barrel, it bulges or blows up! A hard cast
bullet is far more pressure tolerant. Those who use
wheelweights should be wary however, as some of these
contain other metals, such as zinc, which will
contaminate the whole melt with disasterous results.
With our full-bore rifle muzzle brakes, these also adopt
a similar multiple baffle and expansion chamber format
to the handgun recoil compensators. Using exclusively
cupro-nickel or guilding metal jacketed lead bullets
(i.e. regular FMJ ball ammo) there is still a build up
of lead on the pressure bearing faces of the muzzle
brakes. admittedly it is nothing like as bad as it would
be if unjacketed lead bullets were used. By regularly
cleaning these areas after each outing to prevent the
establishment of any deep depositions, it is not a
problem.
I originated and developed the totally jacketed (barrel
plated) bullets back in the early 1980's for the express
purpose of reducing lead pollution on ranges, especially
indoor ranges. It was not only the vapourised lead from
firing the projectiles, (lead free primers having then
been expressly required for german police ranges etc)
but it was also the break up of the projectiles on the
backstops. My "Copperhead" bullets as they were originally
called, deformed on striking the backstop but tended to
hold together within the complete ductile copper jacket,
hence reducing the lead particulate dispersion.
Peter Sarony - Armalon Limited.
Cybershooters website: http://www.cybershooters.org
List admin: [EMAIL PROTECTED]
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