roy brewington
Well-known member
Winchester also makes Bismuth shells. Were actually some good sales on them a while back.
Very interesting and curious point!Perhaps someone with a medical background can answer my question. I have been following this discussion of bismuth shot but I have been kind of biting my tongue so as not to offend anyone. How is it that bismuth, a heavy metal, is any safer than lead which IS known to be dangerous? Not just to the ducks themselves but also to humans who eat the ducks considering the frangible nature of this material. To put it in context, there has been push to outlaw lead bullets for the same reason in regards to big game hunting. I am not trying to poo poo anyone's favorite load, but as a fellow conservationists, I don't think we've thought this one through. RM
Very interesting and curious point!
The internet says not toxic like lead. Maybe someone knows the answer.
Wow.
One important difference is humans have chelation at their disposal, ducks do not. Fortunately, the use of bismuth shot is not widespread because of its cost.Wow.
I'm hoping the few pellets I might ingest would pass just as I ate them and not breakdown.
What do you guys think?
Just like lead shot, they'll pass right through. Not something to spend any time worrying about, unless you're sitting there eating shot as a snack. Naturally, we should try to reduce exposure as much as possible by cleaning birds well and removing shot... but the stray pellet that gets through will not likely do a bit of harm.Wow.
I'm hoping the few pellets I might ingest would pass just as I ate them and not breakdown.
What do you guys think?
Henry,Just like lead shot, they'll pass right through. Not something to spend any time worrying about, unless you're sitting there eating shot as a snack. Naturally, we should try to reduce exposure as much as possible by cleaning birds well and removing shot... but the stray pellet that gets through will not likely do a bit of harm.
Most of us are of an age that grew up in lead-painted houses with lead in the plumbing and I'd bet more than one of us spent our childhood biting on lead split-shot weights or holding weights in our mouths while working on tackle. I have little doubt I swallowed some of all of that.
My point is, many and probably most of us our age have had some level of lead exposure - but lead poisoning is damned rare (and becoming more rare with less lead paint, etc.). I'm not saying lead is safe for ingestion or that we shouldn't take precautions... but for those of us who enjoy hunting (or fishing) as a sport, there are a whole lot of things likely to harm or kill us before a little lead or bismuth.
I would search for more recent studies, if you want to pursue the potential for Bi toxicity by pellet ingestion. The study you found was 20 years ago and somebody probably wrote another since. My (admittedly rapid) read of the paper made me suspicious that it was a hit piece. For instance, the writer found literature documenting that ducks dosed with Bi had a very small elevation in Bi blood concentration compared to the control group. He said that didn't make sense, and called into question the research. His position was that Bi blood levels must be elevated because Pb ingestion results in elevated Pb blood concentrations. He presented no science to back that assertion. It's well established (do a search for digestive heavy metal absorption rates) that heavy metals have a broad range of absorption rates in the digestive tract. There was too much conjecture for me to be concerned about Bi in the environment based on this paper. Shoot some ducks and eat away, just don't bite down hard.Henry,
My concern with bismuth is not so much with our health but for ducks and other waterfowl that ingest it. I've always taken exception with the various government entities that granted bismuth shot its non-tox status when in fact it has been proven a neurological toxin. The attached pdf file highlights my concerns although I would be the first to admit it's a little above my pay grade. RM
Not a hit piece but a carefully written thesis. I encourage everyone following this thread to take some time and carefully read it. RMMy (admittedly rapid) read of the paper made me suspicious that it was a hit piece.
Ducks don't have this option!Stop Use: Immediately discontinue bismuth subsalicylate.
Ducks don't have this option!
Yes, indeed. The author also cited how differences in ph can affect how quickly bismuth is absorbed into the ecosystem. Lest we forget, for centuries lead was considered safe. Today we can laugh at the old axiom, "A night with venus and a lifetime with mercury." My concern is what will the next 50 years teach us after thousands of tons of this material are spread across our wetlands. RMThe bismuth in shot is in its metallic form, not bismuth subsalicylate. The form can be more important than the elements involved.
It would be interesting to know the real numbers, but I'd have to believe it is a tiny fraction of the amount of lead being spread pre-ban (due to fewer hunters, smaller limits, and cost of bismuth meaning it is only a fraction of sold/spent ammo).My concern is what will the next 50 years teach us after thousands of tons of this material are spread across our wetlands.
This is the key point. The metallic form is much less soluble.The bismuth in shot is in its metallic form, not bismuth subsalicylate. The form can be more important than the elements involved.
Kim,This is the key point. The metallic form is much less soluble.
Another consideration is how many ducks are wounded by less effective iron shot, are not recovered and die later, vs. ducks killed outright with bismuth and help fill the hunter's limit.