Ignition timing for stock cam/heads Magnum 5.9?

So I just to be on the safe side, I started with 10* initial and I’m noticing some sluggishness when rolling into the throttle at low RPM. When cruising at low speeds I may be hearing some pinging but I’m not completely sure.

Am I not running enough advance? I’m hesitant to go more advanced if that is in fact a ping.