Suppressor alignment rod readings. Need a little help??

[Gunbuggy]

From my research it looks like barrel threading and barrel shoulder are the main culprits.
I sent these pictures from this post to silencer co (manufacturer of the rod i used) and they said I'm over thinking it. They said as long as I am not touching or drastically close to touching the end cap then I'm good to go.

I think I'm just gonna send it. Will update after my range trip

 

[Gunbuggy]

Sorry I meant surefire. Not silencer co. Got suppressors on the brain

 

[Flopsweat]

 

[aasbra]

Recently picked up a new rifle with a factory threaded barrel. Threaded on a suppressor and visually sighted down the bore from the breech end with the bolt removed. Not noting any issues, I took it to the range and tried it out. Was on paper at 25 and 50 yards without the suppressor. However, once threading it on, was WAY low. Never experienced POI shift like this before.

Located some rod stock slightly smaller diameter than the bore to check suppressor alignment. Figured out why it was shooting so low.


Sent the rifle back to the manufacturer. It came back with a new barrel. Much better alignment/concentricity, but still a little POI shift. Probably manageable for the application and distance I will be shooting this gun.