It seems questionable to me that the article doesn't discuss differences in performance or other drawbacks of non-lead bullets.
I'm not an expert, but a quick Google search suggests that they may be more expensive, less easy to find, and more likely to pass through targets. I found at least one article that claimed they may have greater stopping power since they do not break up in the target as easily. However, I have heard anecdotes about steel shot having less stopping power than lead.
I'm not an expert, but a quick Google search suggests that they may be more expensive, less easy to find, and more likely to pass through targets. I found at least one article that claimed they may have greater stopping power since they do not break up in the target as easily. However, I have heard anecdotes about steel shot having less stopping power than lead.