I think maybe just being semi-auto has something to do with the perceived sound level too.
My threaded 10/22 with my Spectre mounted, even with standard velocity ammo, just doesn't really seem hardly any quieter than my unsuppressed 10/22 with the same standard velocity ammo. Maybe just my ears, which are bad. But I can't tell much of a difference between my two 10/22's suppressed vs. un-suppressed, with either supersonic or subsonic ammo. I "can" tell "a" difference. It just isn't very much.
Overall, for me, suppressing a 10/22, I'd just have to call it a fail. Totally not worth having that barrel threaded.
My bolt action .17 HMR, which is quite supersonic, big difference, seems like. Worth getting the Spectre and having that barrel threaded. Seems like a very noticeable difference. Even though, that round is definitely supersonic and wasn't very loud to begin with, the Spectre makes a very noticeable difference on it.
My semi-auto .22 WMR, really, really wish I hadn't wasted any money on having that barrel threaded. It doesn't seem like enough difference to be worth mentioning. I mean, again, I can "tell" that it is just a little bit quieter with the Spectre. But it's such a slight difference, it's not anything worth messing with. I still want to wear ear protection shooting it with the suppressor. But, that particular semi-auto .22 Mag (922M), actually does not function with the suppressor on it. So, double fail, as far as trying to suppress it. Not enough sound reduction to make any meaningful difference to anything and renders it non-functional to boot. Complete waste of money having it threaded.
My .22/45, very noticeable suppression. With both subs and supers. Definitely quieter with the standard velocity, obviously. With either type of ammo it is way quieter than without the Spectre. Put the fun back in plinking with the pistol.
So, for me, with my guns and my Spectre, very mixed bag. Wish I hadn't wasted any money having a 10/22 barrel threaded, but even way more wish I hadn't messed up a perfectly good semi-auto .22 Mag by having the barrel shortened and threaded. It's not enough quieter to be worth anything and worse, won't even function with the suppressor attached. Nobodies fault but mine, of course, but my lesson learned, maybe somebody else can save themselves the money and aggravation.
Awesome on the .17 HMR bolt gun and .22/45 pistol though. Would buy the Spectre again just for them. But would save myself a couple hundred bucks and not mess up a 10/22 barrel or my 922M .22 Mag.
- DAA