Thanks for all the helpful replies. I am making notes.

I assume from Bob's post, that the (newer) p-t lumber still has the
retention ratings of things like .40 , .60 etc etc.

On the poster who asked what is the "new" p-t wood, I am talking about the
p-t process they use now that has a greater content of copper, and will
corrode regular galvanized nails. I think they started this new stuff about
two years ago.

What is a "star drive lag" ??

Thanks again guys !!!

--James--