A loose arrow to biscuit fit is the prefered fit with a whisker biscuit. Some arrow finishes are going to be consistantly quieter than others. You can get a good idea of the amount of noise an arrow will make as it is drawn across the rest by drawing an arrow over your fingernail next to your ear. Hard smooth finished arrows will be quieter than more textured finished arrows. Some finishes can be wet-sanded smooth or waxed with Armorall to make them smooth, but it is better to choose a smooth shaft to begin with. The biscuit itself will get quieter the more it is shot. I like to shoot muddy grass-encrusted blunts through the rest after a good rain. The dirt helps to breakin the rest in a hurry. A well broken in rest is going to be extremely quiet when used with smooth arrows. A brand new rest that has not been shot before will be stiffer than one that has been shot 100 times. You have to understand that this is a rest that can be shot tens of thousands of shots without needing to be refurbished with tape, moleskin, nailpolish, or shrinkwrap tubing every thousand shots like some other rests. Good luck hunting!