Here is my update…

I came home to clean the gun, ran a snake 4-5 passes w bore scrubber, ran 3-4 patches until the last came out clean.

Then got to thinking…this gun has an adjustable gas block. So I went and found the manual….

I was clearly over gassing the piss out of this rifle, I’ve never had an adjustable gas block and didn’t think about it trying to run it suppressed.

So my Google trail shows and over gassed gun can cause accuracy issues.

Here is the damaged brass and all the pieces are damaged the same, here is the owners manual. I was running it on dial 3 and it should be run suppresses on dial 1

I will still run different loads the next chance I get. But maybe this could explain some of the groups I saw yesterday

Kind of a long post but I remember better if I write it...

I found the brass from the 3rd test shot. It was a little forward of where I was standing. To me that says the buffer weight is still too high at 3 oz. And... that is apparently wrong.

I found the following in an article found HERE:


You would need to see the thread for this to make sense: I converted all of the grams to oz's. The only reason I used grams was that's what the digital scale I have was set to. I don't mind metric... it's just a number. When all of the buffer weight articles are written with oz's it's time to convert

Aero Precision Buffer weight: 3.8 oz
Geissele Buffer weight: 4.3 oz
Removing the lightest weight in the Geissele (makes it rattle): 3.07 oz

I haven't tried the lightened Geissele buffer. I think I'll wait for the Odin Works adjustable buffer to get here or put the Geissele back to where it was. Either way I'll install the adjustable gas block.

These are the two commonly supplied buffer weights. The Geissele buffer that I bought is an H2 and that's typical for a carbine length AR10.

The following info was found HERE:

Heavy or H1:
Consists of one tungsten and two steel weights. Weighs around 3.8 oz.

H2:
Typically composed of two tungsten and one steel weight and weighs about 4.6 oz.

H3:
Normally uses three tungsten weights to weigh around 5.6 oz.

Rifle buffer:
Weighs around 5.0 oz and uses five steel weights and a steel spacer.

Configurable:
You can use different combinations of the included parts to tune your buffer weight to your needs.

If I understand all of this right, the original Geissele buffer, which was the heaviest of the buffers that I have on hand, and an adjustable gas block to let me adjust the amount of gas, should get ejection where it needs to be. This is why I prefer bolt guns

My SFAR won't cycle consistently on the #2 gas setting even when running hot loads so I leave it on #3. It seems to prefer mild loads, possibly due to the dual ejectors. Some on this forum say dual ejectors cause pressure issues or shows pressure signs earlier.

Did you try unsuppressed?

If the barrel is really that sensitive that suppressor is probably throwing it all out of whack. Also I can’t really tell from the picture but if that is a crush washer you’re putting behind the suppressor remove it. Don’t shoot with a suppressor and crush washer. They’re meant to crush so they aren’t concentric to the barrel. Could get a baffle strike or even worse blow up your suppressor.

Why are you using a nut in addition to the suppressor? There should be nothing between your direct thread mount and the shoulder on the barrel. Thread it on, and crank that sucker down so it won't move when the barrel heats up.

Gotcha, just a timing nut for the brake. Like Hicks said there should be nothing between your suppressor and barrel shoulder. I understand it shoots like crap without it, but this is a bandaid work around. I’d be contacting Ruger if I were you.