The "Click-thump" of shooting CCI CB Longs or Aprilla Super Colibri in my H&R single-shot break action .22, quieter than a suppressed .22, and the CCI's are accurate out to 25 yards, Super Colibris are horribly inaccurate and after I use up the remaining 40 or so, I will not be repurchasing them, they can't even breach a soda bottle at 15 yards for Og's sake!, but they are dead quiet in the H&R
The KER-CHUNK! of my Mossberg 500's pump action chambering a round
The precise "Klikkety-clak" sound of racking the slide on my Taurus PT-99 AF to chamber a round from the hammer-down position
The poweful KA-BLAM! and shockwave from my Glock 21 as it hammers a 230 grain projectile downrange, through the paper target, through the plywood backstop with a shower of plywood shrapnel, and finally coming to rest deep in the colossal earthen berm at the end of the pistol range in a shower of sand and dirt