Open-Bolt Myth Testing

[Dayspring]

Tom has stated on several occasions that for spin to truly be a factor on accuracy, you have to reach THOUSANDS of RPMs.

If you look at the image you supplied closely, you will see that the ball is, in fact, spinning. Back when Tom originally posted those pictures, I took the time to measure and calculate the rate of spin for that very image.

This is not to say that the spin was caused by the bolt firing from an open position; it is far more likely that the small amount of spin present is the result of the barrel.

BJJB

[aut911]

everybody takes way too long to explain things. If you have a proper ball/ barrel match on both a closed and an open bolt mark, there will be no real differences between the two in loading the ball due to the fact that they both push the ball atleast a paintballs width into the barrel, past the breach step in the barrel where the paintball is sealed ( friction people) and is ready to fire.

Oh and another myth that is totaly bunk is that ACs and other closed bolt guns are more accurate. Now, mabye straight out of the box because most autocockers come with a reg whereas alot of blowbacks do not, thereby making the AC more consistent. But I truly believe ( and I am always right) that gun X will be equally consistant as an AC or other closed bolt gun with the same regulator. thats all there is to it, consistency of propellant. Why do you think there are scales for measuring gun powder that are accurate to withing 1/10th of a grain? to be a precise as possible, nd accurate as possible because nothing is exactly the same. So we control things like propellant as best we can and keep mechanics of guns and markers within strict tolerances so they are the best they can be.



aut

[bjjb99]

Tom has stated on several occasions that for spin to truly be a factor on accuracy, you have to reach THOUSANDS of RPMs.

Yes he has, and that has absolutely no bearing on my statements above as I made zero claims regarding effects of spin on accuracy. Under normal paintball-related conditions, the paintball's flight path is more strongly affected by random perturbations caused by vortex shedding in its sphere wake than any amount of spin induced by the barrel (Tippmann Flatline and other deliberate spin-inducing barrels/systems excluded, of course).

BJJB

[hitech]

If you have a proper ball/ barrel match on both a closed and an open bolt mark, there will be no real differences between the two...

Even if you don't. All paintball guns have the same accuracy AT THE SAME VELOCITY, regardless of the paint to barrel match.

Paint to barrel match can affect efficiency and consistency. They APPEAR to be inversely proportional.