.22lr suppressor volume ?

I'm working on a .22 rimfire suppressor design at the moment and was wondering if anyone has an old Silent Kill suppressor that they could measure for me .
The Silent Kill used a PVC tube that had no baffles to capture gases , so its volume / size of the tube was bigger than the standard screw on type to achieve a similar sound reduction .
I'm just trying to figure out how much internal volume is required to suppress/capture/slow down the gases of a .22 rimfire when no baffles are used .
Can anyone give me an overall lenght and diameter of a Silent Kill .

Cheers .

Quote:

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Originally Posted by muzza

mine - which has been on my JW15 since new in 1988 - is 42mm OD and 240 long

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Perfect .

Thanks , I can work out an approx internal volume from that :thumbsup:

Yeh I agree .
I had one on a Marlin which was my first Rifle I bought with my own money back in about 1991.
Threaded muzzles weren't exactly factory standard like they are now , so the no gunsmithing aspect was great and the actual sound suppression was Bloody good compared to the Parker Hale screw on's that were really your only other option .
The other great feature of them was they didn't add as much lenght to the Rifle .
They were ahead of there time I think , for example using plastics instead of metal .

My brother had one on a 10/22, all you heard was the slap of the action.

Funny every says that. I had one years ago for my stirling 14p bolt action. Yes it was easier to fit because it didnt need a thread but I never reckoned it was that quiet.
One of my mums cousins had a voere semi 22 with a standard thread on type and that was definitely quieter.
I was a little disappointed but it was still very useful.
That has got lost in the dark ages of moving to aussie and back....along with a gevarm 22. A few of my mates had the odd rifle of mine to play with and they have all turned up but not that one. Bloody strange.
Have a sneaky suspicion my uncle had it

Made one from pvc and hose clamp years ago,worked ok but the DPT I have now is far superior.