Thread: Suppressor sound testing

The first shot is loudest because of the oxygen in the suppressor, subsequent shots are quieter because the gas from the previous shot has displaced the oxygen. Similarly oil, CRC etc. achieves a similar result except the subsequent shots are quieter because of the firing gases mixed with oil fumes/smoke. That effect wears off after 4-5 shots and you get back to the normal repeat shot level. Sound absorbing materials, packing etc. reduce the effectiveness of any suppressor by reducing the volume needed to trap the gases. The most efficient units are filled with inert gas and sealed with thin plastic baffles. Such things are used by special forces but are only effective for the first couple of shots, and are not practical for normal use. 30 decibels of suppression is about the practical limit, and most suppressors are in the low to mid 20's which is fine for normal use, giving effective ear protection and confusing game.