I have never shot a 365 (by choice) because of Sig's recent track record. In a couple years if they hold up and consistently work properly (in other words many up grades/design changes and better parts sourcing) I would then look at one.
With that being said does the 365 shoot SO good that its worth using poor ammunition (115 GD) for a couple extra rounds over a Shield as an example?
If one steps back and looks at this everyone is using 147HST ("the best of the best of the best"-MIB) and switching to ammo not on the "list" seemingly chasing a golden Unicorn. It will cost more in ammo than the gun cost to see if it will run. Don't forget pressure curve has as much to do with it as ogive. Likely the gun is on the edge of functional do to tight tolerances ie. 3" 1911.
And if your just bored and like to spend money I think that's great as it keeps the economy moving.