[AlcoholicusMaximus]

My stamped form 1 showed up, so I asked Model 1 Sales to make a 10.5" barrel with a .082 dia. gas port @ the pistol position. 8 days & $275 later,testing commenced.
8.5gr alliant 2400 & 220 smk cci450 - did not cycle
8.6gr AA#9 & 220 smk cci450 - did not cycle
Opened gas port to .086 using #44 bit, and have been off to the races ever since. Almost all test loads are cycling, subsonic & super.So far, this setup seems to"DO All".All loads were tested with a suppressor. See the "loads that cycle a 10.5" upper" thread in the reloading section where I will post results shortly.
Think I'll have a beer.