Homer,

You may have stated somewhere previously. How effective are these suppressors on high velocity rounds? How quiet or otherwise are they?

Using a borrowed rifle in Norway, I didn't really notice the difference. However it is claimed the animals have trouble placing the direction of the shot. Must have some reduction in the muzzle and noise as well, except I couldn't hear any real difference. Never tested in out intentionally or systematically though. Of course the sonic crack will still occur with high velocity rounds.

G'Day Fella's,

Nitro X, the best example I can give you is;
I was doing some testing one day and a younger hunting/shooting mate of mine (who has almost always worn ear muffs, so still has good hearing), was there that day. I asked him to stand 5meters to the side and behind me whilst I fired some Super-Sonic (.223Rem, 55gr @ 3200+fps handloaded) ammo. I fired a series of shots and then asked him what he thought and also, how was his hearing? Were his ears ringing? To which he replied No, their fine! I then gave him 5 rounds of the same ammo and said have a shot. He proceeded to fire off this ammo and I then asked him again, hows your hearing? Are your ears ringing, to which he again replied No, their still fine! But this time, he had a huge grin on his face!!!

That is the best practical example I'm able to give!

Now, I have to qualify this by stating, it was just a .223Rem and even one of my "Cans" on a .308 is a some amount louder! I'm still in the process of refining my "Cans", for these larger powder capacity cartridges. But this will include working the combustion gas for these (.308-.30-06-Magnum and .338 Lapua Mag), even harder by shortening them up quite a bit! As an example, I'm hoping to get the .308 Cans down to <140mm OAL, etc etc......!

Hope that helps answer some questions.

Doh!
Homer