I use TTSX for this reason. I watched a you tube video of american wildlife rangers xraying shot game and the lead contamination goes further than the visibly shot meat. TSX kill like thors hammer and turn a 223 into a credible deer round so the only counterargument is the higher cost per projectile. I shoot few enough deer that it doesn't matter.
For varmiting I just use lead as I don't plan on eating what I shoot. I have standardized on 50g VMax for varmiting so there are lead fragments all over the place with that. They are cheap and kill well though.
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