I use the same approach.
I shoot the weakest ammo I have (usually Tula or Wolf), tune it until it will not lock back on an empty mag, then open the gas block about 1/4 turn. Test without the can to make sure it will cycle.
I tune it with the can off so that I know for sure it will run with the can. And that provides the softest recoil with and without the can.
I am currently using the Spike's micro adjustable. (Syrac)
And I have the SDN6 can, which is a "low back pressure" 556 can anyways.



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