Clay, I just read the P3AT and P32 manuels online and did not see a "no dry fire" warning. Maybe the LCP is not as much of a clone as one might think.
Haz,
My P32 is a first gen and on page 13 is where the "no dry firing" warning is located in the Assembly instructions. It is not high lighted in any way, just part of the text.
The only guns I use snap caps for are shotguns and 22 rimfires. And with a Ruger, if you read the manuals, even that is not necessary. The LCP is the first no dry fire Ruger of which I am aware.