His theory stated that the food, wine, and water of the Roman elite contained lead, which over time cause detrimental health issues such as gout, brain and nerve damage, brain or nerve damage, intellectual disability, insanity, birth defects, and even infertility. Hate having to though. I know it is a lot of trouble, but shooting a few test patterns can prevent a lot of grief. These people have certainly become the lords of the universe, not the engineer or the master builder any longer. I've been using the red loads, and based on the Hilti guys recommendation thought I'd try the purple loads to see if they'd pound the pins through--they didn't. Looking at the complexity of the buildings and codes you and DickS are dealing with, the quality of your workmanship certainly shows your chops.
Steel In order to demonstrate the difference in the spread pattern between lead and steel shot, I performed a simple live-fire spread test.
Large Pistol Primers in Interestingly, the Prairie Storm shells produced pattern percentages on par with those of the two steel shells, generating about 68 percent for both IC and Modified chokes. Therefore, steel pellets can lose momentum over a longer distance. The results of this test can be seen in the photos below. Steel shot has proven to us that when the conversion is made right, that it is more than acceptable for field hunting use out to and beyond 40 yards.