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: : Another note: the idea that lower pressure break less paint may have come about from co2 users. On a co2 marker lower input pressures eliminate liquid co2, which can cause a lot of breaks. So low pressure might break less paint, but only if you're using co2! : The low pressure/high pressure concept can be exeplified by a blow gun (same principle used in paintball. If you try launching a dart with a very quick forceful puff (a fraction of a second), it will launch the dart to a distance, but if you try launching a dart with a less forceful puff but prolong the puff until the dart leaves the end of the blow gun, it will send the dart farther than the first one.That is because the dart is exponentially accelerated throughout it's path along the inside of the blow gun while on the first method, the dart is suddenly accelerated but only a part of the way inside the barrel. (basic physics}. Now on the ball breakage issue, high pressure systems tend to break a ball more because as the high pressure air hits the ball, it deforms the parts of the ball it hits first, if the shell of the ball is not able to withstand the force, a ball break occurs Which is in contrast to low pressure systems, the ball does not receive a lot of force to deform it's surface thus less ball breaks.