❓ How did you get your .30cal to be "backyard quiet"?

From a pretty simpleminded physics perspective, I would guess you'd want approximately a silencer that's almost 1.5 times the cross-sectional diameter of whatever you consider to be a "good" .22 silencer to be, and roughly just scale-up the internals appropriately. I'm thinking about the relative volume of air you need to manage. So the "diameter magnifier" is about .3/0.2, i.e. 1.5. You could also make it longer, but I imagine long silencers get awkward.

M3 impact about 900 fps jsb 44 gr pellet dfl ronin 700 mm barrel back yard friendly depends on your definition. I know it doesn't scare cattle shooting right next to them

I consider anything over .22 too hot for backyard shooting, however it all depends on your backyards size and location. My .30 is reserved for nighttime coyote smacking and the neighbors like that. Otherwise in my subdivision it’s.177 and paperwork.

1st you have to buy a well attenuated gun, then the correct moderator.
my setup is the
Uragan with the factory moderator.
@ 102FPE its about as loud as my mk2 crown .25 with the factory
moderator lined with felt & curlers @ 62FPE

both have louder impact results than ignition and not
intended for shooting paper.

My impact was shooting 44g hades at 960fps with a ronin on the end and it was NOT backyard friendly, but my leshiy2 with 500fx barrel, fx impact shroud, and ronin shooting hades at 860fps was pretty backyard friendly. I don’t see you needing more power than that in a back yard either.

Backyard friendly is what your neighbors will tolerate. When a .30 start blasting it will get your attention. A lot depends on tune and power level. The aea hp max .30 still have a bark with the Ronin. I'm lucky to have space to shoot a .30 from my deck.

1. Long barrel
2. Modest velocity
3. High-ish operating pressure and low valve dwell
4. Decent moderator

shambozzie said:

Backyard friendly is what your neighbors will tolerate. When a .30 start blasting it will get your attention. A lot depends on tune and power level. The aea hp max .30 still have a bark with the Ronin. I'm lucky to have space to shoot a .30 from my deck.View attachment 301098View attachment 301099

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The AEA HP MAX in .30 is a bit loud even with full on emperor... Or, at least, mine is, but it's tuned for nothing but power.

Still, it's ok for my back yard, but the neighbors are pretty cool.

My L2 .30 is crazy quiet... (Huma air 40mmx5)

I really need to get a chronograph....

My FX Boss (.30) has a Donny Ronin. It's certainly tamed the bark but I wouldn't say backyard friendly. It's shooting JSB/FX 44.75 or 50gr at 850-870fps. The pellet weights you mentioned Matthias (25gr or 34gr) are NOT .30 but .25 cal. so I'm confused. My Royale 500 (.25) with the same Ronin is definitely backyard friendly.

My Gauntlet 30 has no suppression built into the shroud as far as I can tell, with a solid end cap that fits over the muzzle of the barrel and threads into the shroud. It is very loud! The 30 Cal FX / Donny FL that comes with the FX Impact Sniper from the factory reduces it substantially but it still echoes off the hills in our subdivision and can be easily heard 500 yards away. I bought a Buck-Rail.com 30 cal 3d printed suppressor for $20 and it seems to work equally as well as the FX moderator with no change in accuracy. The 60 grain slug impact on my cardboard faced bullet trap is also pretty noticeable.

I may want to get a ginormous suppressor to quiet it down even more some day, but probably won't since I don't often shoot the 30 cal outdoors on my property and if I did need it for taking out a coyote menacing family pets, nobody would complain. I could even get away with using a 223 rifle for that if I kept it under 3 shots. What bugs the neighbors is the repeated whack whack whack for half an hour! For the 30 cals, there is a public land area about 10 minutes from my house where I can shoot out to about 300 yards with no need for a suppressor.

N2 Shooter said:

I run my FX Maverick VP .30 cal in residential areas quiet often. I have the 600mm barrel and the DonnyFL Ronin suppressor. My airgun is tuned at 930 fps at Power Wheel 7, and I think it's like 775 at Power Wheel 1. The loudest sound by far, is the round hitting the target, especially if that target is living! I have not figured out how to silence that down yet.

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You could try a playing a recording of a big dog barking REALLY loudly or a car horn sound, triggered by the muzzle report on a sound sensing switch to mask the impact! ( I should patent this.)

Hi Matias
If your backyard is not big enough and too far away from neighbors I would not consider shooting a 30 in a backyard, a bad shot can cause you problems.
Regards
Enkey

Kral Bighorn .30 and Gauntlet .30 with debounce hammer spring shooting 44.75jsb at 880fps with a Donnyfl ronin. Both backyard friendly.

Short answer, YOU DON'T. LOL

Even if you make the shot quiet the impact on a squirrel is very loud. My 132fpe (66gn@948) impact was as quiet as the average .22 but the sound of the slug hitting a squirrel was like hitting a large wet pillow as hard as you can with a boat paddle. Anyone within 100 yards would hear it. Probably 200 yards.
I made it quiet with the fx empty can type moderator using 2 center sections and 7 3d printed baffles. The Impact was not making 132fpe in this pic.

Evanix RainStorm .30 shooting JSB 44 grain at about 850 FPS. DonnyFL Emporer.
Silent as can be!

Rats? A .177 will do fine no?

I mean, I enjoy my overkill as much as the next guy, but if totally quiet is the idea, and it's just rats, go small.