MeesterStimpy

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I have a HK MP5 22, suppressed. I've run CCI Quiet that say 710 fps and they wont cycle. Federal "Suppressor" run 970 fps and DO cycle. Is there anything in-between ? Trying to get as quiet as possible and still cycle.

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Also, there’s more to this equation than the round. As you know. .22LRs are blowback so a reduced power recoil spring could make a difference. The problem with cutting coils and such is that a .22LR is also filthy because it’s blowback, which means filthier suppressed. That reduced power spring is also going to have a harder time picking up another round and chambering it in a dirty chamber. The same is true of trying to reduce your round. It’s at the cost of reliability and a .22LR is finicky enough. Just saying………

What Squirrelmeister said.

My first post. Because I actually know something about a topic for once: CCI standard velocity 38 and 40, solid and hps (not for meat, they actually will fragment in small game and not exit at times). Everything from Cz455 cut to 16.25 bull barrel, Ruger American cut to 16.25, several 10/22s, including Paclite, AR SBR dedicated .22 upper 5.5, MkIIs, MkII 4.5 PacLite, SR22, etc. All stay subsonic for me. All as close to 100% function as a .22LR can be as dirty as it is, particularly suppressed. I like a rd that works in all of these. I like a rd that gives me the most I can get out of a .22LR without sonic crack and .22LR reliable semi function. Aguila subsonic won’t in all and the 60gr. I would worry about stabilization and baffle strike in a short(er) barrel. I run 4.5, to 5.5, to 9, to 16.25, to 18 barrels, from semis with port noise to bolts without. Caveat: upon pain of public rebuke for OT response, my goal is not the slowest and most underpowered I can run that will still cycle something. My goal is the fastest, most energy, most consistent (accurate) I can run without sonic crack. There are so many variables in suppressed, from rd, to barrel, to blast chamber, to baffle design, to firearm (some suppressors work better on pistols, some better on rifles), to acoustics of where you shoot. Metered Dbs can be variable from what the ear perceives, i.e., actual sound. I’ve run lower metering db cans that “sound” louder than higher db cans. If you want quieter than a pellet gun, run suppressed .22 shorts in a bull barrel 22” bolt gun. If you have the time and patience and want custom tailored quiet in a semi, get a bunch of different springs and a bunch of different .22LR standard velocity and SS rounds and start experimenting infinitum seeking that perfect sweet spot that probably won’t work for other firearms. Most people generally cannot tell subtle differences despite claims to the contrary on forums. (see, e.g., “sub moa” discussions)