Here are some popular ammunition calibers that work well with suppressors: 9mm Luger. The 9mm Luger (9x19mm) is a widely used pistol caliber that is ideal for suppressed shooting. ... .45 ACP. The . ... .300 AAC Blackout. The . ... .22LR. The . ... 5.56mm NATO/.223 Remington. While the 5.56mm NATO and .