TSS comment from a choke company exec...

[briton]

I've shot quite a few with #9 and they do not pass all the way thru the breast. There are always flyers that drag feathers into the breast meat and stop.

[fmf]

I broke a crown on a tss #9 pellet that I didn't find while cleaning.  it is a valid concern but somewhat avoidable

[reflexl]

I bought the Little Wizard II metal detector. I had it happen out of 3 different guns. I love the patterns and it kills like lightning but I can't ever remember #5 copper plated lead staying in the meat.

[WV Flopper]

I believe as posted prior, you were speaking with someone that hasn't a clue what they were talking about. Clean the turkey before cooking, I take pride in that. Do it with care and you will not bite down on any shot. Steel, TSS, or lead, doesn't matter they are all hard to bite down on, just like bone.