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Yep — I’d revert **calls** back to secondary (or at least make them *much* stricter) and let the campaign optimize to the closest thing you have to revenue.
What likely happened is exactly what you observed: when calls became primary, Google found “easier” pockets of traffic that generate phone-call conversions (often broad/low-intent queries), even if those calls don’t book.
A practical way to structure it:
1) Keep **Booked Job (offline import)** as the only *primary / Include in “Conversions”* action for the main campaign.
2) Put calls back to secondary OR set a higher-quality call definition (e.g., 60–120s duration, qualified disposition in CallRail) before ever making them primary.
3) If you want to test calls as primary, do it as an **experiment** or separate campaign with its own conversion action set (so you don’t muddy the learning on the main one).Also: with only 21 booked conversions total, Smart Bidding will be jumpy. You may get more stability using a proxy (form submit) *temporarily* while you build more booked-job volume—then switch back once you have a steadier stream.
If you share bidding strategy + last 30d booked volume, people can be more precise.
