it is not about cycling of the action.
sure, most if not all guns will cycle just fine with a can. but why put more gas to the bolt than needed? excessive gas just hammers the bolt and the lower.
remember that your zero with and without the can will be different. also, amount of gas changes point of impact. zero your rifle as you intend to hunt, with the can, with the gas turned down as far as you can and still function reliably. then leave it alone!