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I have a suppressor that can handle .22lr and .17hmr. I have found that firing supersonic .22lr is almost as loud as firing un-suppressed due to the sonic boom. Sub sonic .22lr is very quiet, but has a terrible drop rate - I have to adjust my scope for even small distance changes

I am interested in firing suppressed .17 to get a flatter trajectory, but I don't want to invest in a rifle and then have it turn out as loud as super-sonic .22lr.

Does anyone out there have experience with suppressed .17hmr? How loud is the sonic boom produced by this little guy?

Thanks!
 

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I have huge long term experience with sub sonics , both 22RF , 17HMR and larger calibers up to 30 so hopefully I can answer your question.
Number one, if the mz vel of the round is such that it is above the sonic level/sound barrier, then you are going to get some noise, but this noise is not a 'BOOM' as you hear from a plane. It is more a metallic PPPZING.

I shoot 22RF every other day doing rabbit and squirrel control out to 100yrds and if I take the time to set my sights correctly then the hold over/under I require from 10yrds to a hundred is easily calculated. I'm on close to 300 rabbits in the last six weeks .... the misses were my fault not the cartridge. Take the time to set up targets at
10yrds, 25yrds, 50yrds, 75yrds and 100yrds and fire a shot at each with your working ammo and make a mental note of each result or initially write of on a piece of card until it becomes automatic. Range judgement becomes vital.
22RF suppressed, the bullet should make more noise as it hits than the actual noise from the rifle. If your getting any noise other than the click of the firing pin then your suppressor is garbage.

17HMR suppressed, you will still get the sonic PPPPPZING but if your suppressor is doing it's job, then no noise from the muzzle. Yesterday I shot a squirrel at 25yrds ...PPPPPZING THUNK!! another squirrel just 15yrds away actually walked across to see what had happened to his mate and whilst sniffing the carcase he went the same fate.

I have mentioned on here before that should you shoot any suppressed rifle and there are two possibilities, then shoot the furthest animal first and almost always the second, closer animal will run or walk towards you away from the bullet strike and almost always stop and look back to see what happened. They only hear the arrival of the bullet and this often confuses them as to what occurred.

If you read MikeG's report on his shooting a Chinese Water deer over here last November in the hunting threads he mentions how he was impressed with shooting a suppressed rifle and other deer only 200yrds away continued to graze in the corn field.

Just to put my experience in context. I always purchase my rim fire shells(22RF and 17HMR) in 1000 batches and re zero for a new batch. I probably only shoot a dozen of each at max on paper for zeroing. ALL of the others have to be directed at something soft and furry.
Hope this helps.
 

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That is great info. I tend to tote my 22 around, and i am not always the best at judging distance. When I shoot in my back yard it is legal, but the neighbors are close enough that I don't want to bother them.

I am guessing that the 17 probably has much quieter 'zing' than the 22 based on its size and shape. I agree with you on the impact of the subsonic bullets - that is the loudest part of the process.

I am just trying to get a feel for the noise level of the 17 before I buy.

Thanks again for the info!
 

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The 22RF should not make any noise whatsoever, just a click of the bolt going forward and then the THUNK!! of the bullet arriving. If your getting noise then your suppressor is useless garbage (assuming you have one fitted??)
if not then you will get almost as big a muzzle report as with standard ammo. The cartridge is just loaded down a bit below the speed of sound for use WITH a suppressor. The 17HMR will just give you the sound of the bullet breaking the sound barrier and that is local to the animal you are shooting at and they have not got a clue where it is coming from, often just doing a jump and looking around thinking "What the heck was that".
Buy yourself a 17HMR, awesome little cartridge.
 

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Lizardtoe-- The sonic crack is the same with every bullet. If you want quiet, it has to be sub-sonic. Super-sonic reports are much different, but not 'quiet'.
 

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That's why I have two sneaky keeny meeny rifles. My 22RF Marlin with suppressor and my TX200 air rifle with suppressor. These are for those occasions when I do not want anyone or anything to know I am at work.;):D
 

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A supersonic .22 suppressed is still quieter than not with the suppressor. The suppressor just makes it hearing safe. The sonic crack from my 10/22 suppressed and the sonic crack from my .17hmr suppressed are about the same. But 17HMR unsuppressed is much louder than .22lr.

If you want quiet in a rimfire you need to shoot subsonic or sometimes standard velocity ammo in your rifle. I like the CCI subsonic hollow point because it shoots pretty flat. Almost as flat as the CCI standard velocity. The difference is about 20-30fps at the muzzle between CCI standard and Subsonic.

If you have a lot of that high velocity brick ammo and want to shoot it real quiet for fun, get you a .22lr rimfire pistol that will accept the silencer. All the brick ammo and CCI stingers I've shot through my Ruger .22/45 lite have been subsonic from that Short Barrel.

Edit: on a side note, subsonic and standard velocity .22lr doesn't make enough noise from my 10/22 to scare off roadrunners or cottontails here. I had a road runner chasing my bullet impact one day out at the range when I managed to get the range all to myself. He ran up to my 25 yard target so I moved to my 50 yard and he quickly got over there after one or two shots. I then switched back to the small 25 yard birm and he returned. He followed the noise of that bullet impacting all over. I got tired of him and shot a couple shots of .223 suppressed and he ran off.
 

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I have Sako Quad with all four barrels threaded for my Silencerco Spectre 11, I've never personally heard a quieter suppressor, 22LR subsonic is the only caliber that is truly quiet, it's surprisingly quiet with high velocity ammunition{mini-mags} as well, 17hm2 and 17hmr are louder, 22 mag being the loudest.
If you want to shoot a 17hmr with game or humans not noticing it's not going to happen.
 
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