Restricted FN factory 55gr SB193. This is as good as it gets regarding 5.7 being quiet suppressed. Key benefits. Flat trajectory. Penetrates soft body armour and helmet up to 200m. Greater incapacitation effect than 9mm. Does not go through a 40cm gelatine block. Rapidly loses energy at over 200m. Caliber standardized by NATO. The SB193 (also formerly called the SS193) is a subsonic cartridge featuring a 3.6-g (55 grain) Sierra Game King FMJBT (FMJ boat tail) projectile. The SB193’s sub-sonic speed eliminates the distinctive “crack” created by supersonic rounds. The muzzle report is also reduced when using the sub-sonic ammunition together with a suppressor. Due to the greatly decreased muzzle velocity, the SB193 benefits from a slightly reduced recoil force of 1.3 kgm/s. The SB193 can be identified by its white tip color. Its sale is currently restricted by FN to military and law enforcement customers.
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How does your suppressor handle the 5.7 rounds? I’m waiting for a silencerco switchback and am interested in the banshee