I'd talk to Hughes and see if he can cut one with more counterbore. If not, you can mail it to me and I'll take care of it.
One more thing to check is the thread tenon length compared to the depth of the adaptor.
the adapter should thread tight against the barrel shoulder. Most suppressor adapters these days have a small counterbore to account for the lack of a relief cut on the barrel threads. It'll be easier to correct the adapter than it will be to correct the barrel.
Here is an example of what your...
Keep your palmsaver with your reloads and leave the jag towards the muzzle. Or have the jag turned down to the same diameter as the rod. I've done the latter to a few now and it's worked pretty well.
Mauser- 35 Whelen, 30-06, 280
I think they're all stainless though.
Tikka blued new take offs - 7 rem mag, 30-06, 308, 6.5 cm midweight
Tikka stainless- 308
Howa Mini- 6mm arc sporter contour
A few Marlin barrel in 30-30 and 444.
Also a .458 blank and a spiral flute 6.5 blank.
I've got a couple of inkbird PIDs that I use regularly. I haven't had any issues with either. You'll want around a 6" thermocouple, and an SSID with a heat sink to handle the load circuit.
One of the lovable quirks about the 88!
If he hasn't already, cleaning and greasing the sear surfaces helps. DO NOT TAKE APART THE TRIGGER ASSEMBLY!!!
Because of the difficulty in assembling everything again, a trigger job is going to be pretty spendy. They can usually be brought down to...