That's great ammo if your rifle groups it well. I've shot it a bit and it works well on critters and never goes crack. I have had the same issue as you with CCI Subsonic - would often go crack.
If you can watch for the sales and get in immediately if GC do a deal on that CCI Suppressor - it's become very spendy lately
I also had that crack issue with CCI subs on a plain new jw15. Sold the rifle when I sold my land.
Was trying to remember why I didn't keep using the plastic suppressor on the Martini...then I remembered why.
I changed the stock (and suppressor had no where to fit on to).
Artillery...landscape adjustment since 1300AD.
Another vote for CCI Suppressor 45gr. 1000fps in mine. Combined with an A-Tec that I got from the A&P show years back, it's extremely quiet.
Resident 6.5 Grendel aficionado.
and THIS is whats wrong in this world at the moment...CCI are selling ammunition as subsonic...and for lots of folks its not.... they ALSO sell other stuff for slighty higher price that sure n certain to be subsonic...see the irony here???
its the old protection racket ....... you have a problem?? ok we can fix that for you.get your wallet out.
subsonic should be just that..yeah I accept if used in out of whack firearm like 10" barrel or pistol/revolver its going to be weird velocity wise..but say 11-22" barrels it should be subsonic....or sold as lower speed/std velocity like it used to be....
75/15/10 black powder matters
As everyone has said, ammo seems to be the problem in this case, but one thing I found making suppressors was that all my metal ones produced a bit more noise than some 3D printed ones my apprentice made for me. If you've got or know someone with a printer that could be an option for you. I'm happy to send you some files to try if you want, just let me know your barrel dia & thread and any size limitations you may have ie max length & Dia.
insulation tape around your suppressor will so similar thing...dampen the noise that is...
75/15/10 black powder matters
ihave a toz 17 with manders suppresor fitted by the man himself in the early 1980s he machined /threaded an adapter for the muzzle bell and viola .only probas ive eve r had with that rifle was remington subsonic ammo on a big buck jacko -as bloody drag queen with a rimu dutch clog would have bowled the bloody thing those rounds went poof ,n bang poof bang , till I gave up in bloody disgust .winchester sub sonic dynapoint and rabbit ammo -all bloody deadly in her . my other .22 has a GC suppressor and the stirling features a sniffy custom jobbie -heavy but bloody excellent.
@ Brad S , the rifle is totally bog standard and factory spec. You don't need or want to be altering it. It is a lovely example of a CZ 452 and they have a well deserved reputation as great .22
There is a misconception at times between what "silenced " movie guns are and the real world of shooting.
As you have mentioned environment can alter things as well . Shooting from a confined space like a room or having those pine trees in the back ground will bounce your sound signature back to you and make things seem louder.
I have found bolt rifles like yours with a good suppressor and the right ammo to be the quietest as semi's also have the noise of the action cycling.
Don't forget also what your hearing behind the butt will be different to what an animal hears 50 mtrs away.
I would be taking advice from the other forum members and try a few different ammo brands.
You will find the right and most effective combination with some experimentation and time, good luck and enjoy , it's all part of the shooting and hunting experience and learning.
Being on the coast near sea level I have found that CCI subs do let off a crack depending on atmospheric conditions i.e sudden drop in temp, change in air pressure and fog/heavy dew quickly forms on still evenings/mornings
On still fine dry days or breezy days, even light showery days...no supersonic crack, which is most of the time.
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