I seriously doubt there is lead contamination to any appreciable extent outside of the wound channel unless it’s due to mishandling of the meat during processing.
From what I recall from the followup studies, there was a much higher concentration in ground venison, which imo would point to mishandling. If the food pantries are concerned, there's no reason they couldn't do a quick xray, I believe some are already. IMO the eventiual objective may be to disrupt hunting by ruling certain bullets illegal. It's a shame, aside from the fact that there are a far greater number of gun hunters, I know I'm far more likely to donate late in the season. When my freezer is filled from bow kills.
Elemental lead is not toxic. We leave bullets in people all of the time if they are not easily accessible at the time of surgery.