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MasterGoa · April 19th, 2008, 11:25

The reason I brought up rifled barrels if that in target shooting,
bullet spin is of utmost importance. Since the projectile revolving
around itself will create it's own gravitational field, it can move
inside a pocket of air that will give it better down field velocity and
less sensitivity to cross winds.

Having said this, the factor in paint ball or paint soft is that the
projectile is filled with liquid. That liquid will resist the projectile spin
and can actually start wobbling which is worst than if it was not
turning at all...

So I was inquiring in what ways can bullet spin can be attained in Airsoft...

This is also a very interesting thread by M76 because Cartridge Overall Length
is an important factor in target shooting. If the bullet is too close to the rifling,
pressure buildup could cause mechanical failure. However, to much clearance
will cause the bullet to accumulate sufficient velocity to cause excessive
bullet shear.

In paintball, the outer shell of the ball is very thin, so bullet shear can very
well cause bullet failure in the barrel. This is why variable rate of twist
in the barrel will cause a softer rotational acceleration and will prevent
the balls from ripping their outer shell trough bullet shear...

Very interesting discussion...

Pierre

April 19th, 2008, 11:25	#17
MasterGoa Trader rating Join Date: Apr 2008 Location: Deux-Montagnes, Quebec, Canada	The reason I brought up rifled barrels if that in target shooting, bullet spin is of utmost importance. Since the projectile revolving around itself will create it's own gravitational field, it can move inside a pocket of air that will give it better down field velocity and less sensitivity to cross winds. Having said this, the factor in paint ball or paint soft is that the projectile is filled with liquid. That liquid will resist the projectile spin and can actually start wobbling which is worst than if it was not turning at all... So I was inquiring in what ways can bullet spin can be attained in Airsoft... This is also a very interesting thread by M76 because Cartridge Overall Length is an important factor in target shooting. If the bullet is too close to the rifling, pressure buildup could cause mechanical failure. However, to much clearance will cause the bullet to accumulate sufficient velocity to cause excessive bullet shear. In paintball, the outer shell of the ball is very thin, so bullet shear can very well cause bullet failure in the barrel. This is why variable rate of twist in the barrel will cause a softer rotational acceleration and will prevent the balls from ripping their outer shell trough bullet shear... Very interesting discussion... Pierre __________________ There is nothing real outside our perception of reality.