Am not a duck/goose hunter but thought bird hunters might enjoy reading the article below which describes results of the most exhaustive study likely ever done concerning types of bird shot relative to lethality on various game birds.  The results bust some long-held hunter myths but was fairly scientific and exhaustive in scope:

Is Steel Shot Effective? Here's What the Data Say After Decades of Testing - https://www.msn.com/en-us/travel/news/is-steel-shot-effective-here-s-what-the-data-say-after-decades-of-testing/ar-AA17Oeby?ocid=msedgntp&cvid=b209c3502aa349fcbcb574fcd749105b