Re: Recent advances in suppressor design/AAC SCAR-H SD
Interesting post, I'm sorry I caught it a month late.
I also own a SCAR H SD, and have mounted and put it to good use on several bolt action and gas operated rifles... First things first, looking at the name alone, the SCAR H SD was not designed for a bolt action rifle or true "precision" rifle, but a 7.62 assault rifle, it was built to be durable. Secondly, the MITER system does very little to "tune" a rifle, I don't, and have never, shot more accurate groups on one setting over another, what it does do is give you a reference point, so that you mount the can in the exact same point every time, and it works, I have a fantastically repeatable suppressed POI shift. With that being said, I was surprised to see your groups, because both of my APA bolt actions shoot terrible with the bare 3 prong flashhider. When Jared produced my last rifle I asked them to shoot it with a bare muzzle before mounting the 3-prong and it shot .17 in, then opened up to .4 in with the miter mount, which for a 4,800$ rifle is terrible (luckily with the suppressor in place it drops back into the .10's) SO, my overall theory was that the 3 prong design while suppressing flash, either negatively impacts the harmonics or the prongs themselves disturb the even dispersion of gases exiting the muzzle in turn disturbing the projectile.... So, you're pictures somewhat differ from my tests...
All that crap being said, your suppressed groups are F-ing atrocious and I would be upset that an $1800 attachment to a $3200 rifle ruins your accuracy. I have ran mine on a JP LRP 7 with a similar barrel contour with no issues so I really really suspect the manufacturing, my muzzle has a perfectly centered bore thankfully but I can't fathom how having one that is <span style="font-weight: bold">not</span> centered would <span style="font-weight: bold">not</span> effect the accuracy of the rifle, uneven dispersion of gas, uneven temps, all sorts of uneven shananigans... thats not the ideal environment for the exit of the projectile.
I wish I was stateside right now, I would love to figure out a way to exchange cans and see what would happen, hit me up in a month if you're really bored! I would continue conversing with AAC, I own a variety of cans from the big manufacturers and personally have never had a bad experience with their customer service, or, sell the darn thing. I honestly can't see what could be done to "tune" your rifle as it seems to be running just fine sans suppressor. I do not have a degree in fluid engineering so if I have violated some rule of nerd physics with my theory I apologize.... theres my 10 cents.
