Looking to query the masses as to the suitability or success of modifying a gas port dimension.
To be specific, I am re-utilizing previously shot out 20" custom barrels. These barrels have outstanding bores, it is just that the throats are gone from NM shooting. These are cut down to 14.5", re-threaded at the breach, chambered, headspaced and when assembled, have a longer muzzle brake pinned on. Previous ones have shown phenomenal accuracy, however there lurks a common problem - gas port size.
The larger gas port in a 20" bbl is typically .093 in a Krieger.
I am mulling over an option to tap the hole up in the front sight assembly where the gas travels between the barrel port and the gas tube, install a threaded bushing and re-ream a port to a smaller dimension than the .093 in the barrel or the .120 passage in the front sight between the barrel and the gas tube.
This would be in essence, a "restrictor plate" in NASCAR parlance.
Intent is to start at .062 then work up to where I have reliable functioning and avoid the FTE, o ring / extractor / buffer etc etc BS.
Thoughts?
Anyone ever tried this?


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